Well, it's like this: the host machine is acting as a multi-purpose server (for company website, statistics, game server etc) as well as an internet gateway for the company computers, so yes, it is possible that the server IP did appear attached to my nick when I did various tests from the company LAN.
I want to stress out that this is NOT a personal computer or a home LAN server, but a well known public server which our company has been hosting since 2004. NIMBUS ETPro server was the second public Enemy Territory server created in Romania and is one of the 8 romanian servers today.
Please note that the NIMBUS gameserver IP 81.196.146.245 is the SAME as our company's website www.nimbus.ro IP. And you can see here the server statistics from 2005, hosted on the same machine.
The IP issue has not been a problem until a few months ago, when our server suddenly stopped streaming, so why is it a problem now? Has PBBans changed it's policy recently?
That being said, please reconsider this ban, you'll be doing romanian gaming community a big favour :)