The latest version of mod_security has been built for CentOS-5 and CentOS-6. Also included with in the CentOS-5 build is the version of lua that ships with CentOS-6.3 as it is a requirement for the latest mod_security.
Please test this build and provide feedback so that we can get this released or fixed if there are issues.
http://people.centos.org/hughesjr/mod_security/
Thanks, Johnny Hughes