If the LNB (= the sticking out bit) attached to dish is a dual model, which has two cables running from it, you can use them independently to two separate devices. However if the LNB is a Sky Q model, which also has two cables running from it, one cable is used for signals that are horizontally polarised and the other is used for vertically polarised signals. (i.e. each cable only only feeds half of all available channels to a Sky Q box, so they both need to be connected to it to receive all channels).
So if you're sure that your LNB is of the older (pre Sky Q) sort, you can feed them to different devices but you can't do it using a Sky Q LNB. I note also that you mention connecting a cable directly to your TV set, rather than via any type of satellite box. That will only work if your telly has got a dedicated Freesat tuner built into it, as Freeview tuners require signals on different frequencies, and using a different technology, to those inside satellite boxes or dedicated Freesat TV sets.