Hi Peter,

As of Totara 2.2.10 it was possible to restrict the "user" report source via the "Content" tab to only show users created before/after a certain date.

As of Totara 2.5.0 the user creation time is available as a column and filter option along with the other user data in report sources.

It is not currently possible to create an audience based on user creation date (only first login or most recent login).

Simon