I’m not sure I’m understanding you correctly here but, If you want to control Roon playback from another device than the one that the Mojo is connected to, you either have to
- install and run
Roon
(and leave it open) on the ASUS your Mojo is connected to - install and run
Roon Bridge
on the ASUS your Mojo is connected to
prior to be able to do so. Make sure the zone is not marked private in device setup (Settings|Audio|Cog-wheels
).