[Zope] Setting Local Roles from Python

Greetings! I am relatively new to Zope, and have benefited greatly from following this mailing list. Currently, I have a Member product which (among other things) stores information about the members of my site. I am trying to figure out how to set the local role of a specific user to be the manager of a specific Member object (so that the user can manage their own Member object, but no others.) Unfortunately, I have not been able to find any information on how to do this from my product. Any assistance would be greatly appreciated. Warmest Regards, Keith R. Alperin