The Worst Thing in the World ...and it feels just like I'm walking on broken glass

in a my site i have splited it in subsites with the same database sharing the the table of user,profile e session with same prefix.

I have used nodeprofile e user in a subsite with table prefix profile_ , and organic group e forum in other susites with their prefix og_ and forum_.

With the module workflow_ng after i ha ve make a redirect of all user/* pages to site profile/user/*.

So i have different node_access table for any subsite