Unfortunately, it is not supported at the moment to add categories to your polylines and polygons and then filter via category. We do apologize for the inconvenience.
With that said, we do have another product which is in pre-release that will be able to achieve this.
If you would like to receive our beta version, could I kindly ask if you could please submit a support ticket here -> https://www.wpgmaps.com/support/ -> And please mention my name in this ticket so that the other agents will know to assign this ticket to me.
I hope this helps clarify, and we look forward to hearing back from you.