it seems you have 0 idea about how networking works if u ask such questions. Not to mention who the fuck decode l2.ini or any other file for ip nowadays, lol.
System give you 100 ways to show that ip,
any network monitor/sniffer from google show that ip,
any firewall from google show that ip,
most anti-viruses also show active connections.
You only need to type "how to get ip from game" into google, to get few milions of answers with examples for 5yo kids.
And you want to hide it, rotfl, wake up.