Allow restricting portal access by customer domain

Problem definition

When public signup is enabled, I can restrict portal access at a per project level by setting "Customers my team adds to the project" or "Anyone can send a request...".

These two settings do not allow me to configure specific portal access for customers by their domain. This is problematic when I have different JSD projects serving different sets of customers who shouldn't be able to access each other's portal.

Suggested solution

Add a third option under Customer Permissions which lets admins configure "Anyone belonging to {some-domain} can send a request".

Workaround

Set all projects to "Customers my team adds to the project" and manually manage customers without using self-signup.

This, unfortunately, is a very tedious process for large groups of customers who have to be added to a project, or if new customers need to be constantly signed up (from the allowed domain) and added to a project.