Layering object ids?

[michae]

Is there any way to be able to use multiple object ids on different groups of one hierarchy?

[CAPTURE_MM]

simply add the IDs to each group and not to the hierarchy itself?
Alternatively work with vray object properties, activate "override object id" in each property and sort things the way u won´t by adding grps, shapes, objects to the specific property node in your outliner...so u´ll always have an overview over which object has which id without having to check in the objects shape node every time....
one object can just belong to one object property only, but one property can have endless objects of course....priority for adding objects to properties is innermost.
The vray object properties can have layer overrides so u can change them layerwise...
Adding objects to properties works via drag and drop, but to remove an object from a property u have to use the relationship editor.