How to restrict content in a special way

Hi There,

I need you advice on how to perform a specific thing wanted by client. Let me explain:

I have 5 folders (A,B,C,D,E) containing mix of doc (pdf, xls mainly) that should be accessible to specific users.
Users Jim, John and Steve +30 others should have fully access to all Folders A,B,C,D,E
Users Mary, Richard, Clarence should have only access Folders A,C
Users Paul, Bill, Jane, Joan +12others should have only access Folders B,C,E
Users Frank, Albert, Dwight +10 others should have only access Folders A,C,D
etc…
Do you know any plugin in order to perform such restrict access? Any suggestions is most welcome.

Thank you in advance
Gianni