imports everything into that module, even subs/scalars

The advice in What_Not_to_Export regarding scalars is this

Do not export variable names. Just because Exporter lets you do that, it does not mean you should.
 @EXPORT_OK = qw($svar @avar %hvar); # DON'T!
Exporting variables is not a good idea. They can change under the hood, provoking horrible effects at-a-distance that are too hard to track and to fix. Trust me: they are not worth it. To provide the capability to set/get class-wide settings, it is best instead to provide accessors as subroutines or class methods instead.

Which is where I think this node started with the problem

$userid = $manageusers::LoggedOn_user_id;

and I think you were on the right path here in eliminating the global variables

I also changed $LoggedOn_user_id to a function call &GetLoggedOn_user_id to deliver the number to the other module and it still does not work.

I think you now know to make it work.

poj