How to Track which Site is using the Apache Processes. [DirectAdmin]

Edit your /etc/httpd/conf/httpd.conf and add

just after the code that says "ServerSignature On". Save, exit, then restart apache. You can access the stats page by going to http://1.2.3.4/httpd-status where 1.2.3.4 is your server's IP.

If you're running apache 2.x with custombuild, then it's already in the file:
/etc/httpd/conf/extra/httpd-info.conf
Change the "Allow from" lines to include your IP, or remove the line completely to allow from all.