Questions Time Clock Entries --> Time Approvals (Manufacturing)

OK. I have a bit of a unique situation I am looking for the answer for.  I have a time clock that I use to generate a clock entry into a Production Order This works great. However, I have Team leads that approve their team's time I need a way to have Joe the team lead log in and approve and only see Joe's team. Whereas Joe's supervisor John can see and approve Joe's time and all of his team's times (Joe, Nancy, and Juan the Team leads). Setting employee reports to etc on the employee records doesn't seem to cut it and the approval screen is kind of an all or nothing scenario it seems. Thoughts?