[Zope] How do I get an owner of an object?

[Miruna Badescu]

I'm creating some kind of CMF and I need to test if a user is owner of
an object, in order to let him edit or not the object. 

The regular: AUTHENTICATED_USER.has_role('Owner', this()) 
is not working fine since it's based on acquisition: if you own a
folder, it presumes you own the things inside it.

So I tried owner_info, like zope uses, but an user has to have 'View
management screens' to call it. I don't want to give this permission to
most of the contributors.

Is there an work-arround?

Thanks,
Miruna