RQM 5.0: Restrict user to access some of the sections in Test Plan and other to acess rest of the sections.

In our test plan we have around 10 sections for that two teams are responsible updating the values lets say teamA and teamB. We want to put the restriction that the teamA will not be able to modify/edit or may not be able to see if possible the section which teamA is not responsible for and vice versa for same test Plan.

Is it possible to restrict perticular user to access some of the sections in Test Plan and other to acess rest of the sections?
Your help would greatly approciated.:) :)