That's right. You need seperate run for each receiver OR.
You can run 2 lines from the dish. One for 119 and the other for 110. Run to your media box. In there you can put a
DP34 switch. Connect those 2 lines from dish to port #1 and port #2 (to dish) and connect 4 lines to receiver 1,2,3 and 4 to each receiver.
If you have legacy LNB's, you need to run all 4 lines from the dish.