[Forminator Pro] Single Submission Per User

Hello,

First off - Forminator is awesome! I just deployed it to my multisite network and I think our users are really going to enjoy it over the previous plugins that we suggested.

It would be great if Forminator could limit forms so that each user can only submit the form once. This is something that we\'ve been looking for and we haven\'t been able to find a form builder that is as feature packed as Forminator that also has this single-submission restriction capability. Ideally the user would be able to edit their submission if they returned to the form but simply having it prevent a second submission would be a fantastic start.