You can use regular expressions in a regexp filter inside Aritic PinPoint filter conditions, wherever is required. Aritic PinPoint recognizes all common operators like | for OR (first string|second string), character sets ([0-9], [a-z0-9] etc.), repetitions (+, *, ?) and more.
You need to escape special characters with \ if you want to use them as matching character.
Learn more about regex here.
Note: Please note that Aritic PinPoint uses POSIX regex, which could behave differently from other types of Regex.