Show value if it's exists in both fields

[Newton]

I have two fields with plenty of usernames and want to display [Field 1] values, but only if it's also exists in [Field 2], how can I do that?

Example:

[Field 1]	[Field 2]
Name A	Name C
Name F	Name X
Name C
Name O

A table or chart that use [Field 1] shoud only display "Name C".

[Chanty4u]

Here's an example expression that you can use to create a new field:

=if(Match([Field 1], [Field 2]), [Field 1]) as newfield