Hiding a Form From All Users Except Member of an Organization

We need to hide one form in the Help Center from all of our Zendesk users, except for the members of one organization.

I've found articles on hiding a form from everyone in an organization (https://support.zendesk.com/hc/en-us/articles/4408886229146-How-can-I-hide-ticket-forms-based-on-a-user-s-organization-)  and hiding a form from the drop-down menu in the Help Center (https://support.zendesk.com/hc/en-us/community/posts/4411892827674-How-to-hide-dropdown-field-value-in-the-request-form-for-End-User-).

But I can't seem to get the pieces to fit together. Anyone know how we would do this?