So - I don't see the substring-after function in your filter. I still don't really understand what the issue is, outside of that - I'd expect once you've added the substring-after function, when you open the form in the browser, you would see your first name. If someone else opened the form who was in your list, they would see their first name. If someone opened the form who was NOT on the list, they would see nothing, because the formula would return no data.
Hilary Stoupa
