As of April 1st, 2015, Lightspeed has released a Google Chrome extension compatible with Chromebooks that will allow web filtering outside of your network. This guide provides setup instructions for using this extension.
In order for the LSChromeFilter extension to work properly, you must have a Lightspeed Rocket running version 2.9.2 or later
You must also have the following settings configured on your Google Admin Console:
If these settings are not configured properly and a user logs in to a email domain that is not registered, the device will not be filtered.
Once the LSChromeFilter extension is applied to a user and the user attempts to access the internet outside of your school network, the user will be asked for your School ID.
Your School ID can be found on your Lightspeed Rocket under Web Filter > Mobile Devices
The user will only be asked one time, but will not be able to access the internet until they enter the ID. Once the correct School ID is entered, the user will never be prompted for it again on any Chrome device.
The configurations above will apply your Default filter to all users when outside of your school network. When an end user reaches a blocked page, they will have the option to login with their LightSpeed credentials in order to have the appropriate filter applied. The Lightspeed LSChromeFilter extension does have Single Sign-On capabilities to automatically apply the correct filter to each user, but additional steps are required for this to work.
Follow the steps here to configure Single Sign-On: https://wiki.nwoca.org/x/9gzlAQ