Limit Operators to Specific Birth Groups?

[mitchfx]

There's a fundamental workflow question I've been trying to figure out in tyFlow, mostly made a little confusing due to my more Thinking Particles conditioned brain.  If I have several birth events (Birth Shape) that then get PhysX Shape assigned in that same event.  At the end of each birth event is a Send Out to send them all to other shared events (Bind, forces, etc).  However I would like to apply certain external events to only specific Birth groups, not only via things like Distance tests that are evaluating all particles.  My guess is there might be something basic I'm overlooking.