You can run a DP 311 receiver and a DP 322 Receiver from 3 types of Dish Pro Plus LNBs: a DPP Twin, DPP 1000.2, or a DPP 1000.4 LNB. That is, run 1 line from the DPP Twin/Triple LNB to the 311 and run the second line from the DPP Twin/Triple LNB to the 322 (with a seperator). But, if you don't have a seperator and you happen to have a 1000.2 LNB, you could run 1 line to the 311 and 2 lines to the 322 without the use of seperator. (Because the DPP Twin has 2 outputs and the DPP 1000.2/1000.4 has 3 outputs.)
If you just have Dish Pro LNBs in inventory, then you'd have to use a DP Quad LNB where you'd run 1 line to the 311 and 2 lines to the 322.
You can also use a Legacy Quad in the same way.
With switches integrated the whole game can change.