OK,
no can do. You can reference a drawing file, but everything that's defined in the DWG is going to be part of the XREF. Even Paperspace objects, although they will never be visible.
Map3D would let you query in a subset of the drawing, by layer or by area, or other properties, but not vanilla.
A workaround may be to go to the XREF drawing, and WBlock out the objects you want as a new drawing, and the XREF them back into the original drawing, and into you new drawing.