Add custom options to Apache Vhost config
Yes. In Lion, you do this by:


Creating a .conf file that contains your custom Apache configuration directives
Creating a .plist file in /etc/apache2/webapps that references your configuration file — see the manage for webapp.plist
Running webappctl to load your configuration file into one or more of your websites (virtual hosts) — see the manage for webappctl


A bit more about this can be seen at http://support.apple.com/kb/HT4813