Question on Setting up a TFS 2013 Proxy server

Hi Folks,

I am just in the process of setting up a TFS 2013 proxy server.   I would like the team that is accessing a Team Project to only have access to a particular subtree in source control (basically one Visual Studio solution rather than all that belong to that team project).  Is this something that I can do permissions wise, if so how do I go about it?

Regards

Andy