Specifically in addition to "Not visible in portal", "Visible to employees and partners", "Visible to anyone" I would like to see "Visible to the Creator". The main reason I need this is that I am defaulting Ideas as "Not visible in portal", and eventually changing most of them to "Visible to employees and partners", but I would like to make customer ideas visible to the customer who created the idea because without that they don't get notifications about the idea. It seems that since idea notifications are tied to idea visibility that there needs to be more visibility options.
Good news! We added more options for controlling idea visibility in your portal.
Automatically set the visibility of new ideas based on who submitted the idea - a portal user, internal user, or Aha! user. Configure this in your portal's settings under Overview > Type > Visibility.
We also added a new 'Visible to creator' option that allows only the idea submitter to view their idea in the portal and receive notification emails.