Can there be more than one regex? It doesn’t seem to let you have multiples like permalink normalizations, for example.
I’ve a client who’d like phone numbers and emails hidden.
Edit: No, but you don’t need that, just use a |.
\d{3}-\d{4}|[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+ will censor email addresses and xxx-yyyy phone numbers.