Wildcards or Regular Expressions supported for sender email adress?

Hi Community !

I'm using Email Securtiy Version 7.3 and would like to create a rule which matches on certain email sender adresses.

Question here is, are wildcard or even Regular Expression supported in the "Who -> User / Groups" part of the rule?

As an example,  helloworld_asjirh=asirnnmn@some_random_subdomains.domain.tld  is the email adresse. helloworld and domain.tld are static parts which stay the same.

Everything between helloworld and domain.tld could be random characters and vary from emailaddress to emailaddress.

Is it possible to create an rule for the sender address which looks like  ^helloworld.*\.domain\.tld$ ?

(From field starts with helloworld, followed by random chars and ends with domain.tld )

Thank you.