If it works the same way that Spectrum's app works with regular cable subscriptions, it's only partially tied to your home internet.
With Spectrum's app, not all channels are available for streaming unless you are connected from your home internet connection. (This is determined by you IP address. If Spectrum is streaming to the same IP address that it has assigned your modem, then it is streaming to your home.) This "home streaming" gives you access to all of the channels that you subscribe to.
However, when you try to access your streams from outside the home—meaning that the IP address you are attempting to stream to is different from the one assigned to your modem—then only some of the channels are available for "live" viewing. The channels that are only available for "home streaming" are usually the local broadcast channels, some sports channels, and others that place requirements on streaming access.