I want to use a drop down menu in a cell that will look up a list that will
have different categories in it.  My question, can I filter these categores
in the drop down menu : i.e

Paint     (cat name)
          walls  (list name)
          ceilings (list name
Plaster   (cat name)
          single side ( list name)

Hope this all makes sense (and there is an way of achieving it)

Thanks