I do not see any reason you can't attach multiple Fastrack power supplies to  your layout.

With good, clean track and connections, the track limit is when you start to lose power on the far side of the layout. To compensate, distribute the power around the layout with multiple power sections.

Depending on the size and complexity of your layout, there is no limit to the number of LionChief trains running on the same layout with sufficient power. The question becomes can you keep track of the trains and control them all?


Larry