If you don't want to implement security in Access, you can get the windows-login of the user. In these cases I prefer using an API-call:

Private Declare Function GetUserName Lib "advapi32.dll"...

DoubleMetaphone is a kind of Soundex, but more powerful.

The original article describing the method can be found at:

http://www.cuj.com/articles/2000/0006/0006d/0006d.htm?topic=articles

A translation of this function in T-SQL can be found at:...

This explains, I was not aware of this filtering before the join.

Thanks for you reactions.

Erik