Auto complete of a field for certain users? URGENT!

Auto complete of a field for certain users? URGENT!

Hello,

In my application, I have a form field for which Public users are required to enter their email address.

I want to HIDE the email field from my logged in users.

I don't want PUBLIC users to see an initial value for the email field.

Is there a way to set the field to load an initial value for logged on users only?

Thank you!