The name Clientx is not used by the engine. However when even office does not run in multiplayer on your system, and you get communication trouble messages, probably you're a victim of the multiplayer sync bug (see "known bugs" below). If you don't want for the version with the fix to come out, I suggest participating in the beta test.

PSCJ, I suppose you were removed from the beta tester list because emails to you came back. I've added you anew with the new email address.