I don't understand it either. In fact it's the same as, but more flexible than the '2nd cable from motor' option for a conventional LNB.
No it is not the same. This is not a second cable, it is one cable that is supposed to be connected to a distribution system to feed all the tuners in a building. The idea of having an LNB that is designed for communal use attached to a motorised dish is ridiculous. What you are asking is special software to be written for people that make bad hardware choices.
May I ask you which is a good hardware choice for three tuner (not for communal use) inside the same receiver?
Three dishes? This is a bad communal choice :-)