FWIW, there's an icon on the right side of the Material Editor, four colored balls with a black pointer, "Select By Material." Selects all meshes that use the currently-selected material.
good idea yes. But my main problem was that i had more than 500 objects, and to find the right one was difficult. The problem find multisub material, is that you can not select object my material (or not that i am aware of).