To test the behavior of mods in an MP environment it is sometimes required to have two or more players present on a server, so you can observe the situation from the local mp player as well as a remote mp player perspective. Not everybody has a spare computer that can run DayZ.
Right now you get kicked with "A ticket has already been submitted for this SteamID." when attempting to join twice.
It would be nice if we could pass a parameter to the DayZDiag.exe to "fake" a different SteamID for additional game instances. According to some pre-discussion with a developer, something like this might already have some implementation and just needs to be exposed for us modders?