My guess is that it's a special rule that applies to throwing weapons, since the rule you quoted is in the section on throwing weapons and not in the general rule for multiple attacks. I'll check with Da Boss to make sure, though.
What I really wanted to know is what happens when you dual wield two firearms

If a [another] game let you dual wield, the "norm" use to be that you can fire both weapons at the same target.
Some games also let you hit two individual targets, once with each weapon - but that is normally an edge case.
Since you are allowed to hit one target multiple times with throwing weapons it felt natural that you were allowed to hit one target twice if you dual wield two firearms in addition to hitting two individual targets, once with each weapon.
Devices don't need to be meshed into ...
I was thinking about Change Linked Device Mode on p.163 (and Eject Smartgun Clip on p.164) that both quite specific mention you need DNI to take advantage of various action economy wireless bonuses including, but not limited to smartgun firemode.
If you don't need DNI - how DO you take advantage of the various action economy wireless bonuses that let you do things with a free action (probably the Change Linked Device Mode Free Action) instead of the [manual or AR] simple action Change Device Mode.... Thought only technomancers could influence the matrix directly with their mind without using some sort of DNI

...that some wireless bonus would require DNI - in
addition to have access to the matrix
I'm not sure that conclusion is supported by the rules. The descriptions of fire modes on p. 179 indicate that Semi-Auto Burst, Burst Fire, Long Burst, and Full Auto modes all can use the multiple attacks option. I'll check the errata to see if multiple attacks with a firearm presupposes a Complex Action.
Yes, we had (have) a long discussion about this earlier today in the linked thread.
Seem as if there are different rules on different pages that say different things and/or that there are rules missing.
P.179 State that you can use BF weapons to fire at multiple targets with the same burst, Long Burst weapons to fire at multiple targets with the same burst. Full auto weapons to fire at multiple targets with the same burst.
P.179 Also state that you can use suppressive fire for a combination of controlled and fully automatic bursts focused over a narrow area and directed at anything that moves. Suppressive fire is explained in detail, but it does not actually state which weapons that can use it (only that it cost 20 bullets over the cause of a full combat turn).
P.165/167 State that you can dual wield SS, SA, BF, Long BF, simple FA and complex FA to do multiple attacks.
P.165/167 State that you can use a single firearm for a SA burst or a Long Burst to attack multiple targets within Short or Medium range (but it does not state that you can use a single firearm in BF, simple FA or complex FA to fire at multiple targets)
P.164 State that you can do multiple attacks when combined with Fire Weapon Action, Throw Weapon Action, Melee Attack Action, Reckless Spellcasting, or Cast Spell Action.
P.196 State that you can take Multiple Attacks with a single melee weapon and when dual wielding firearms or melee (but it does not state that you can use a single firearm or throwing weapons to take the multiple attacks free action).
P.196 Also state you are limited to weapon skill / 2 targets.
Q If p.179 is correct - where are the rules at p.165/167 describing number of targets, stray shots between targets, how far away targets can stand, what their defense modifier will be, does it act like a cone spray, if so size of cone, do targets need to stay at close or medium range like the complex action description for SA-Burst and Long Burst on p.167. what happen when you use 3 bullet burst and have automatic skill of 7+ and according to p.196 can attack 4 targets. How do you even split an individual BF on different targets (tap trigger once and it fire 3 bullets in 0.1 to 0.2 seconds...)
Q If p.165/167 is correct (and you can only attack multiple targets with SA burst, Long BF and suppressive fire) why does p.179 state you can attack multiple targets with BF, simple FA and complex FA (or is p.179 talking about attacking with SA Burst, BF, Long BF, simple FA and complex FA while you dual wield...? That would actually make most rules fall in place and make a lot of sense from a real life perspective - but in that case the wording on p.179 is very bad).
Q If p.196 is correct (and you can only take the Multiple Attack Free Action if you have a single melee weapon or dual wield melee or firearms) then why does p.167 state you can use SA Burst and Long Burst to attack multiple targets when you wield only one firearm and p.179 that state you can attack multiple targets with SA Burst, BF, Long BF, simple FA and complex FA.
Q Do you need a weapon with FA mode to use Suppressive fire. p.179 only mention you need [up to] 20 bullets...