Only allow specific domain submissions in a URL question (RegEx)?

I have a question in my form that asks for a URL. We only want to allow specific URLs to be submitted, to ensure consistency but also to prevent spam. Is there a way we can enforce a specific domain be entered?

I imagine this would be done with some sort of response validation via regular expression. Google Forms has this basic functionality, and I’d expect Typeform to have it too.

Thanks!