Restrict membership registration by email addresses of specific domain

I need to restrict membership to users with email addresses from a specific domain.

For example, for automatic discount codes on Woocommerce, it allows me to create a rule with a wildcard like this:
*@companyurl.com
This applies the rule to all email addresses from @companyurl.com.

With Register Helper Add On this doesn’t work and it looks like you have to specify each individual address, which is not feasible for us.

Will you please confirm if there is a way to manage this?

Thank you