Authentication messages to secure.log vs system.log?

I’m using OSX 10.7.5 with VineServer 4.01.
I’m aware that it writes its own log file (~/Library/Logs/VineServer.log)
as well as /var/log/system.log.

What I’d really is for it to send its AUTH related messages to
secure.log instead (or even as well as) system.log, but I’m
hesitant to change my syslog.conf.

Currently, the related entries in my syslog.conf are:
.notice;authpriv,remoteauth,ftp,install,internal.none /var/log/system.log;authpriv.
;remoteauth.crit /var/log/secure.log

Is there a simple solution for this (sorry, if the question is too basic).