Here's the deal...

I'm logged in into a DNN portal ( 4.5.5. ), so I do have my own open session.  At the same time with me, from another machine, somebody else can login into the same session ( using my credentials  - tried it, it works). 

Let's say that I'm accessing a page which is available only to subscribers ( on a pay per access rule ).  If I'm giving my credentials to another "user" , he will be able to access that page simultaneous with me.

Is there a way to prevent that?  I mean to have only one login available per user/per session?

Thanks for your answer...

This is not good though.  I think there might be a security issue somewhere.  I thought that as soon as a user is logged in, DNN  will prevent another user to login with the same credentials, as soon as that user is still logged in.

I don't even want to think about what it can happen with payed membership on some sites....

I'm absolutely sure that somebody thought about this and solved this problem.....