By clicking on the Profiles tab at the bottom of the screen, you are brought to a new page where you can set Parental Controls. From this page, you are able to create profiles for the different users on your network and assign the appropriate devices to them. What this does is allow you to manage the connected devices for a user all at once, rather than having to set Parental Controls device-by-device.
To pause the Internet for a particular profile, you have a couple options. First, you can click the pause icon associated with the desired profile. Second, you can click the arrow icon for the desired profile, which will bring you to a new screen where you can create pause schedules and/or set Internet usage time limits.