Start by logging into your Servosity client under the account you wish to limit.
Click on Backup Sets.
Click on the name of the backup set you wish to edit.
On the left panel, click on Show advanced settings, then click Bandwidth Control.
Clicking the slider to the On position will reveal the bandwidth control settings.
You have two modes to choose from.
Independent: This applies the bandwidth limit to each backup set individually.
Share: This takes the bandwidth limit and splits it equally among all backup sets.
To start specifying rules, click 
Add new bandwidth control
Note: To set up the bandwidth limiter to start and stop at specific times on certain days, you will have to set a single bandwidth control rule for each day.
From this screen you may add a new rule to control the bandwidth usage of Servosity offsite backups.
You can have the bandwidth limited at all times or add a range of times to have it enacted.
Once ready, click OK, then click Save on the Bandwidth Control page to save your changes.