Particle System Collision: Collisions and Trigger

In generic colliders, there is the distinction between "Trigger" and "Collision". Why is it not the case for particle systems?

In the Shuriken Particle System module, when "Send Collision Messages" is activated, a message is sent to the colliders it collides to. However, the particles will react/bounce with the collider.

Is it possible to configure the ParticleSystem in such a way that it bounces to some colliders in a certain layer (collision) and only trigger the messages to the colliders in another layer?

Thanks.