You can’t use wildcards, but you can use PHP Regular expressions. Remember to tick the box in the “RegEx” field.

See some tips in the Help Tab in the campaign editing screen.
Also, check out tutorials like: http://regexone.com/references/php
http://php.net/manual/en/reference.pcre.pattern.syntax.php

And a RegEx live site to run tests with a sample text: http://www.phpliveregex.com/