Restricting exposure to active lists

I'm looking to use this module to link some of my Drupal sites into phplist functionality. The readme that I've just downloaded with the stable D5 version states : "Which phpList mailing lists will appear in Drupal? All mailing lists which are marked as 'active'."

Am I correct in assuming that all active lists will be shown to Drupal users? If so this means I need a separate install of phplist for each Drupal site that I want to link, which seems like overkill. This got me to thinking that it would be more elegant if I could just have a single installation of phplist which could link to all my Drupal sites, using maybe a phplist admin user to filter the lists that were available to any given Drupal site.

Assuming this functionality is not in place, is it on the to do list? I note the message about sponsorship, and while I doubt that I could fund a significant chunk of work, I would be willing to make a small contribution towards this sort of functionality.

Regards
Graham