Hi Daniel-
Avid FX doesn’t support any comp camera system. The option that you found in FX that seems like it would create a comp camera actually is there for when the effect is being used in Adobe After Effects.
The plugins utilized in Boris Red and Avid FX are actually built on the Adobe plugin structure and will have some residual settings and preference options for those programs, one of them being the comp camera setting you found in 3D Particle Array.
Hopefully this answers your question.
-James