Using multi-voice output with Logic Pro 10.7.8

Has anyone used the latest ‘Logic Pro Virtual In’ (new to Logic Pro 10.7.8) as an alternative to IAC midi routing on a Mac for using Scaler multi-voice output to drive multiple tracks?

I am trying to drive 4 BBC SO tracks this way, but can’t figure out how to set it up (or, indeed, if it is possible).