Restrict access to form

My form should only be usable for invited guests. Is there a way to limit access in any way? We would prefer individual email/password combinations but we are open to other ways. Let's talk about my plan if this is only available for corporate plans.

Unfortunately, Jotform doesn't currently have a password-protected form feature. But if you want you can do it using the condition. 

1 - Place a form field for the password and make the field required.

2- Control the response of this field in Settings -> Conditions to hide or show the rest of the form to the user.

For card form :

For classic form : 

Please feel free to contact us if you need any further assistance.