I've had a search and Google and found ways to monitor bandwidth per virtual host.
What I need is a way to monitor outgoing bandwidth (and eventually suspend) of sub folders of my document root. (I've got cron running a global bandwidth checker).
/srv/www/htdocs/user1files
/srv/www/htdocs/user2files
I don't want virtual hosts because I do not want to restart or "reload" Apache, every time I add a "new user".
I'm thinking the Apache access log may offer a way using awk to total all the /username1/:
10.65.10.77 - - [10/Mar/2013:10:20:17 +0000] "GET /user1files/upload.php HTTP/1.1" 200 10945
10.65.10.77 - - [10/Mar/2013:10:20:17 +0000] "GET /user1files/styles.css HTTP/1.1" 304 -
Many thanks in advance!