[Zope] privledges to MySQL database

I have a MySQL database I want users to be able to edit on a per *record* basis. Essentially, each database record is an entry about a person, and I want that person to be able to edit their own record. I can see how I can do it on a per column or per table basis from within MySQL, but not on a per record basis. I wonder if I could write a method that would take care of this issue. thanks for any tips Kevin