In some scenarios using the Events app, an organization may want only certain user groups to have the ability to utilize a particular payment method. For example, an organization hosting a gala with corporate sponsorship levels on the same registration page as individual tickets may only want corporate sponsors (or internal staff) who have authenticated be able to view and choose the invoice payment method.
At this time, this feature does not currently exist within the Events app.
A common work-around for this is to temporarily enable the invoice payment method, have an internal staff member authenticate as themselves and then user the login as user feature to login as a specific user, and then register for the event using the invoice payment method.