Sort colored STEP-Import to individual Rhino-Layers


I’ve imported a STEP-File and got also the individual color distribution of the customer. The problem: All surfaces are (with different colors) in the “Standart” Layer but I need individual Layer to export the Geometry correct into my renderengine (.fbx). I know I could select the colors and dependent geometry and change it to another layer but I want to know if there a more straight-forward/automatic way?

Many thanks!

I’ve also another question: Is it possible to import multiple STEP-Files and get for every STEP-File a individual layer or is it the only way to import each file individually? Thanks!