Code to monitoring IP numbers

[omar]

I want some suggestions for some code I want to write.

Let's say I have 10 different logins on my PC.
I want to use my mobile to login and connect to the internet with each ID.

Now, for each ID, I want to make sure that the IP address is NOT one that has been used by one of the 9 ID's on my machine (can be anything else).

If possible, would love it if it were possible to stop browsers from connecting until a new IP address was used.
Else, happy to have a floating window that flashes red or something if a matching IP address that was used with other 9 ID's is being used again.

My ultimate aim would be to create an exe and run on startup.

I'd need some basic logic and thinking of how code runs... like where to store and record IP addresses. Store on internet? Or store on local PC? If so... is it possible to make accessible for all IDs?

Code sounds super simple.
Just wanted some thoughts.

Thanks.