When loading a file from solidworks to edgecam via the edgecam launch button inside solidworks, a xml file is created. In this file additional data like for example threading information is stored so edgecam can read this so called cosmetic data.
Via this xml file you can also output things like face name and make it go into the edgecam features. This however will require you to make your own launch button to include these facenames.
Hope this helps