[Zope] Session Management

Hello all. I'm new in all this Zope concept and products. I'm building a site that requires user control and management all over it. What I need is to keep track of my user in the website, he logs in and I have control of what he can see, do, or can't. Is there an easy way in Zope to implement this, I mean like a product or something. If this is not the case what function in python can help me to accomplish the task. I'm looking for something like PHP sessions and sessions variables. But if there is some other way(a better one) I welcome your suggestions. Thanks in advance Gerardo Amaya