You can set category for piped email under Assign Category setting. If email receive on that piped email it will create a ticket of selected category.
For this go to Support Plus > Add-Ons > Email Piping.
For example, You have categories
You must be having auto assign of these categories to supervisor specialist in that area. So you can setup separate pipe connection for each category like:
If you get email on firstname.lastname@example.org then a ticket will be created of sales category and automatically assign to sales category supervisor.