Apache Module mod_suexec
This module, in combination with the suexec support program allows
CGI scripts to run as a specified user and Group.
SuexecUserGroup directive allows you
to specify a user and group for CGI programs to run as. Non-CGI
requests are still processes with the user specified in the User
directive. This directive replaces the Apache 1.3 configuration of
using the User and Group directives inside of VirtualHosts.
SuexecUserGroup nobody nogroup