[TASK] show dedicated messages to Accenture / non-Accenture?

[JoernBerkefeld]

We've been struggling with logging usage info because we couldn't correctly filter Accenture computers from others, so we never implemented it. I noticed that the environment variable USERDNSDOMAIN holds a distinct value for Accenture and could be used to enable tracking limited to that specific audience and, hence, would not affect anyone else.

The environment variable USERNAME holds additional info to distinguish users.