[rsyslog] Right regex format for property based filters

[Janis]

Hello list.

I have a question regarding to rsyslog configuration. What is the 
correct syntax of property based
filter with regex.

I'm using this configuration right now, and would like to create date 
based logfiles for each host - hostA, hostB, hostC.
But it doesn't work this way.

$template TplFile,"/var/log/hosts/%HOSTNAME%-%$YEAR%-%$MONTH%-%$DAY%.log"
:HOSTNAME, regex, "hostA|hostB|hostC" -?TplFile

And when running rsyslog with -d, I got only false matches on this 
regex. I seems that it tries to match all the text
inside quotes instead of regexp. As I have red in man page, and html 
docs, then regexp should be in POSIX RE format
(tryed also everything enclosed in braces). For example, if I change 
regex like this:

:HOSTNAME, regex, "host" -?TplFile

Then it works and matches all the hosts (A,B,C), and creates the files 
for each (well it's the same as using contains).
But that doesn't solve the problem, when there isn't equal start 
prefixes for all hosts.
For example if I want to match hosts - dog,cat,cow.

Best regards
--janis