How to show different part of the form based on their Role ?

Question

Dear members,

 

I am building this web form using master template in Bootstrap and stored procedure without entity framework.

 

The user that create the xyz form will be forwarded to the supervisor which will see the same xyz form PLUS additional section Approve or Reject with reason.

 

Can someone tells me how to build a form like that ?

 

Do I need to create 2 separate form in this case or do I include the addition Approve or Reject section on one form but how do I disable the view of this section to the user  and enable it for the Supervisor only?