How to create an approval form, to show or hide specifics parts of the form?

So basically I want to hide certain section of the form for public use; but still utliize those those internally.

So like employee fills out the request - then I get the supervisor to approve/deny.

If you want to show certain part of your forms, only to the admins or the people who will approve the forms applications, then you can implement the general workaround shown on this guide: https://www.jotform.com/help/432-A-General-Approach-on-Building-an-Approval-Process-Workflow 

Let us know if you need more help.