We host many open source projects on OneDev system and therefore we allow open registration for community users and "Auth Source" for these users show "Builtin User Store". And this us correct.

However, for our team members we manage accounts externally and for our team "Auth Source" shows "External Authenticator" which is also correct.

The problem is, that some team members create their accounts directly in OneDev before they are created on our external system. And this is a significant problem for us, because then we can not longer manage their accounts on our external system.

Ideal solution for us would be to restrict self-registration for users based on their email domain. To be more specific, we would like to allow self-registration for users with emails that are not in our company domains.

Is there a way to restrict user registration in such a way? If not, is there a chance to have something like this in future versions?