I'm building a form where I have both submitters and approvers viewing the form. I want to be able to identify the current person in the form and compare to that list then build a rule that either makes field visible or editable accordingly. I searched and tried a few options but none seem to quite fit the bill...I see where I can identify the current user but I can't figure out how to compare them to the SP List of users in a formula or variable to use in a rule. HELP!

-I'm using the Responsive Designer