We could select the object and "Hide Object" from the contextual menu but that change would have to be done for every view in the project and we were hoping to avoid that.
Similarly, if we were to turn off the "floors" category in the VG of the linked model, then items we want to keep for the third floor will disappear along with the items we don't want to display on the second floor.
We could create separate worksets for each of the floors, then turn off the worksets (assuming that can be done with VG on a linked model.
Either way, it seems we have to do a lot of "manual work" in several dozen views for each floor.
Oh well, we've got some late nights ahead anyway, what's another 2 or 3 to play with VG.