Image Filters on single Objects

Hey all,

I am compositing an environment of many 3D objects and am trying to get a feedback effect on some of them. Currently I am working with two layers fed into an “over” top, then applying feedback edge on the layer that renders only the objects I want to have the effect.
Naturally I am loosing all depth information like this, and can’t move objects behind or before objects of the other layer. Is there a way to apply feedback or in general image filters to certain geo objects, or what workaround would you suggest?