Multi-Store Authorization - Private Stores

Here is the scenario...I have successfully set up multi-store for 4 different stores, meant for 4 different clients, with ALL products contained in the same database, just made available to each store as necessary. I have implemented the "Private Store" extension, which works great for login purposes, but once I'm logged in, I can jump from store to store, even though I'm not a part of that group. I would like to have each store compare against the customer's group id, and if they are not in the customer group allowed for that store, kick them back to the login screen for their own customer group's login. Any ideas?

You can try turning off the shared store sessions but i doubt that will do anything. Sounds like the dev didn't code the mod to work with multi stores. This is actually a pretty common thing....and its quite annoying to find out after purchase. I would ask the dev to fix it so it works correctly.