Print request leaves user computer with diffrent username

Hi Guys

We have recently installed Fuji Xerox printers. We have 2 user where when they try to print (users login as themselves) and print request goes out as different user. I can see in a print queue that jobs are not sent by real user but another user. It appears that print queue thinks that print request is not from the user who really sent the request instead other user. I checked AD and ADSI but I cannot see the the reference to the other user. We are using follow me a equitrac softwaer utility and follow me will not release the request as it thinks that job is not from the real user.

Please advise if you have any idea about it?

Thanks in advance