Add custom fields - User Module

the organization of users that I have is complex across a number of subsidiaries. I am trying to create a number of teams for Zoho Analytic Reports that are spread across multiple roles, profiles, and territories.

Instead of selecting list of users each time, I wanted to add a couple fields to the user screen in CRM so I can use them to define new groupings for the purposes of reporting in CRM and Analytics. Is this possible?