Contacts can be manually added to multiple organizations

Background: There are cases where a contact represents multiple organizations and we want that person's feedback to count as feedback for each of those organizations.
The challenge: If they are using a generic email address, like gmail, it does not make sense to add that domain to each organization. In this case, we need to manually add this contact to every organization they represent. Currently Aha! only allows us to manually add a contact to one organization. This means that their feedback is being excluded from important organizations that they represent.