PipZu
You can connect up to 4 receivers to one dish, you need to get another device called an LNB.
As Sky will only give you 1 dish and digibox, you will have to buy a second one if you need it.
However a mate of mine got a second 12 month subscription as he used the name on the house (as opposed to the number) and a different family name, but needed a different tel no.
Subscription 1: Joe Bloggs; 1, Happy Road, tel 1234567
Subscription 2: Jane Bloggs; "Very", Happy Road, tel 1234568
It was a great victory for the little man!