Hi!
I'd first suggest to try to use the C4D's native material stacking (see the attached image), otherwise if you really need the Layer shader, I'd suggest to use the Effects->Projector shader to modify the projection of the individual layers
Edit: Sorry, I thought you were talking about the Layer shader... With Layered material, it's currently impossible to modify the projection of the individual materials... You can always try the native stacking though!