There is absolute no problem with you doing as you ask.
however, the user(s) will have to be logged into the correct security
workgroup file.
If all, or some of the users have rights to use that secured database, and
then are logged into the correct security group..then they will have no
problems here.
However, if you are asking how can users get access to a table when they are
not part of the workgroup? You can't do this, unless you create some
workgroups, (or users) in the default workgroup file. However, if you modify
and change the default workgroup file, the it is not default much
anymore...is it?
So, as long as the users are logged into the correct workgroup file, then it
don't matter if the current database is secired, or not. What ONLY matters
is they are logged into a workgroup that gives them permsisions..
However, if you are asking if this can work when they are not logged into
ANY workgroup file that DOES NOT have permissions...then no...you can't do
that (and, if you could....what use would secirty be!!)