I've seen it in the b27 vid, the first one before the 4 dev diaries. actors friendly to each other don't collide with one another and can't shoot each other so you can have multiple actors on the same plane firing at a target.


is this at least possible just for particular factions or actors?

Yeah, there is a mod named Diemos Federation, some of it's cannon turrets have that feature. They only kill enemy drop ships and units.