InfoPath Dev

How do I only allow the document library owner and the creator of the form to access the form once submitted. Also, once the form is digital signed, can anyone take off the user's or supervisor signature?

Hello,

Access form once submitted,

1. You can add the User Roles in this group you can add the users which can allow that form after submitted.

2. You can add the first created user name in one field and while opening that form check the log in user is equal to created user name or not.

Once digital signed no one take off that form.