Reports - Limit to Supervisor

If you want to filter by a User's Supervisor and limit the report display so that it is showing records where the Supervisor is the current user:

From any User table in the database:

Users > Supervision - Supervisee > Supervisors (One Row Per Supervisor) > Supervisor > Database ID

Then use that database ID for a filter. It automatically add a filter that gives you the "Is the User Viewing the Report" option.