Christian,
We get the request about every 4-5 months (which actually makes it a not common request) to support multiple Pages. It's still not something we support in JFBConnect because it's tedious to manage. Each Page Tab requires it's own Application ID, which means JFBConnect would have to manage all that stuff. It's simply not requested enough for us to implement a great management system to do that right now.
However, if you're interested in making some code changes, we can help guide you in what you'd need to edit to hard-code some API/Secret keys into our Page Tab stuff along with the URLs that the user should go to. It will take a little bit of work, but shouldn't be overly difficult.. if you're not too scared of some PHP
Thanks,
Alex