Filter Linked Model Walls by Workset

Is it possible to filter linked walls by workset? All the exterior walls are on the same workset inside the linked model.

I am trying to filter down to all exterior walls, separate the walls by type, and calculate the areas of them.

So far:

It looks like you’re using GetParameterValue on the parameter list itself. You need to use it on the wall element.

Thank you, this seems to work for me: