German to English Law/Patents Law: Patents, Trademarks, Copyright Rejoinder in the field of ICT/networks

Dieser Sachverhalt ist jedoch gerade nicht Gegenstand des Klagepatents, das eine Anmeldung/Authentisierung gegenüber dem Internetdiensteanbieter gerade voraussetzt und bei der Kontrolle der Datenkommunikation anhand der öffentlichen Netzadresse für die Kommunikation im öffentlichen Netz (Internet) ***ansetzt***.

I have:

"These circumstances are, however, actually not the subject matter of the patent in suit, which precisely requires logging in with/authentication vis-à-vis the Internet service provider and ***is based on taking*** data communication ***being monitored*** by means of the public network address ***as a starting point for*** enabling communication in the public network (Internet)."

The problem is that I do not fully understand the story when it comes to the network technology aspect. We have a redirection server, a user's rule set, users gather in computing class and the teacher is in a position to decide which user computers are granted access to the Internet after logging in to a preceding local network and which ones aren't or based on which prerequisites they are, there is, like I said, a privates Zugangsnetz preceding the actual Internet, log-ins (to the privates Zugangsnetz, which is also called lokales Zugangsnetz in the rejoinder - I think???), which is seemingly not quite the same as the "authentication" (meaning that the user is identified - I think) it also talks about .... it's really a bit confusing for someone who only occasionally works in IT.

- Does my translation at least make sense, even if not sounding particularly elegant?
- If so, how could I make it sound less stilted?
- If it doesn't, I would appreciate your suggestions based on logical analysis and possibly also a certain understanding of both network technology and the logic of putting forward an argument and making a point in patent litigation as this is for a demanding customer.

Best regards,

Sebastian