change user role on login

hi,

I have a query regarding user role in alfresco.

For example: Let there is one user "test". He logs into alfresco and he lands on his user dashboard. Now he wants to create a folder in global repository and for that he requires the role or permission. So, i want to ask is there any way by which i can change his role or give permission to that user on a folder without admin rights.

Thanks
Nancy