[Kexi] A question in designing a Kexi application

[scott]

   Just had a thought about designing a Kexi system:  Is it possible to
implement a sign-on/sign-off system?  My thoughts about this are:
1) Have a Kexi database with a user id, password, user's initials, and
an authority level.
2) The user's initials and the authority level would be passed to other
Kexi screens.
3) The user's initials could be presented on each screen.  (But how?)
4) Each screen has an authority and the screen authority would be
compared against the user's authority.  If the screen authority is less
than or equal than the user's, the user can proceed.  Otherwise the user
is prevented to the screen and an error message given.
5) Also, as a side thought, can certain fields be prevented from being
displayed?  Also, a field can be displayed, but not altered?

   Is it possible to do this in Kexi?

Thanks,

Scott