In the Administrator module, there is a function allowing to export in a .txt file the names of the users for each user list. We need to do this list by list. If we have dozens of lists in a datasource this is very time consuming. The use of PowerShell has been suggested, but this is not accessible to all administrators. It would be very usefull to use the existing function, but beeing able to select several lists at a time, and export all of them, with a colomn "member of", next to the name and other existing information.
Currently Administrator allows to select multiple user lists or groups and export to .txt file. Only unique users are be exported. If the same user is a member of multiple groups or lists there is only one row in .txt. That row would have to list all all groups or lists where that member participates. If your requirement is to have easy filtering by a list that may not work very well.