Advanced Selection

Does anyone know if I can modify the Categories in the "Advanced Selection" menu?

What I want to do is be able to select items in my assemblies that have a finish applied by outside contractors or by material.

I have several parts in my assemblies that have custom properties but they aren't showing in the Advanced Selection drop down lists.

This question was asked previously here https://forum.solidworks.com/thread/34088?q=advanced%20selection but no answer was ever given.

Thanks in advance.