Filter users by email domain

We're working on a larger user group program built around Khoros Group Hubs. For that, we will also be employing About Group Hubs. Unfortunately, the process to invite members to these group hubs doesn't scale too well as you need to know which community names you search for to invite them.

I am therefore looking to build a custom component to filter all community users by members that have a verified email with a certain domain. Unfortunately neither the API v2 users collection nor the API v1 email resource seems to allow filtering for email domains.

Does anyone know how to filter users by email domain?