Win2K3 Enterprise server and Media Services client access

HI all,

I need to lock down a windows 2003 Enterprise Media services server, the

user has paid accounts and requires only 1 username and password can access

the server at any one time, I have been playing with this for ages now and

cant seem to get only 1 at a time set. It works great if you want to allow

more than 1 connection out of the box, sadly this is not what the client

wants though ~:( (pesky clients ) )

I had thought about doing this through TCPIP addressing but the problem is

most of the clients are on dyamic ip rather than static. I thought of a

possible solution using a webpage to allow user to login, grab the IP and

inject it into the tcpip allow rulling, but it wont allow for removal of old

or exisitng IP.

Does anyone know if this is at all possible, or are we forced to suggest to

the client Real Helix server to do it as his clients are "sharing" content

rather than paying for the content.

Any assistance gladly appreciated.

Thanks,

Chris