Modifying Virtualmin GPL user account's bandwidth


I have been playing with the GPL version of Virtualmin for a while now and I just did a fresh system install and restored all domains from a backup. I am now looking to be able to modify the accounts limits. So far the only limit I can’t figure out how to change is the bandwidth limit.

When I go to bandwidth montioring, two of my domains are showing unlimited and the third is showing 15 gb. I would like to change all of them to 10 gb. (BTW, I am the server owner and have full root access.)

Any help you can give me would be great.