Object Visibility per Camera

["Matthias Worch" <mworch(at)gmail.com>]

Can somebody post a quick pointer to the "correct" way of excluding/including specific objects when rendering through camera. 

I have a scene with some objects I want to render an ink shader on (for wireframe outlines), and some objects that I don't want the outline on. So I set up two cameras, one with a ink lense shader and one without. I have two passes, each using one of the cameras. 
So now I need each camera to see the appropriate objects. What's the best way to set that up?