This is what i find from NALDIAG "loc mask"

Loc mask
C Force caching
D Desktop
F Force run
L Launcher (NAL)
Q Quick launch
S Start menu
T Taskbar
W Workstation associated (ONLY)

A bit tricky, if you have an application associated with a user and a WS,
all user flags would be dominant and worskstation flags dont appears, but
the application appear twice into NALDIAG and one with [X] at Workstation

If you have only a WS associated, W will appear and the flags are from the
associated WS.

i dont have any source for that

Hope this will help you