Provide permission at folder level in a component

In a single component is it possible to provide file/folder/package level access to different users
I have a single component , but multiple packages , Need to allot the permission @ package(Folder level).

I cannot create different component as there is a problem in project structure.Please refer
https://jazz.net/forum/questions/171118/is-it-possible-to-maintain-structure-of-eclipse-project-from-multiple-components?page=1&focusedAnswerId=171185#171185

Awaiting reply

Thanks