The resource kit has a program called IFMEMBER , which you can use in your login script logic. IFMEMBER works by checking for membership in a group and returning an ERRORLEVEL hence you'll have a bunch of IF THENS. Code segment section:

:its
ifmember itsgrp
if not errorlevel 1 goto hrgrp
net use u: \\server1\itsshare$

:hrgrp
ifmember hrgrp
if not errorlevel 1 goto secgrp
net use u: \\server1\secshare$
...

Unfortunately, I believe ifmember only works for NT workstations.

Check out John Kozubik's tutorial Windows NT Login Script Tricks and Tips for tips on NT login scripting.

Microsoft has introduced the downloadable Windows script for vbscript scripting purposes.