There's probably a painfully simple answer to this, but I've been struggling to figure out how to do it.

I want to create a displacement map over part of a figure, and standard bump over the rest (the alternative would be to be able to assign different displacement levels to different areas).  The different areas do not align with the regular material areas of the figure. Is there a way to do this by assigning a node mask to the displacement channel? Or is there another way to do this. 

Does this make any sense?

I'm using Poser7 SR3.

Any suggestions appreciated.