There is no official support for SirusXM within Sense, and from looking at some online forums it looks like there has not been any support for it on LMS for quite some time as well. You could voice your interest over on our Feature Request site here, and submit it as a suggestion for voting.
The only workaround for now that i could suggest is if you happen to have Apple devices (iPhone, iPad) then you could Airplay this to the Innuos instead. For now, that would involve installing a plugin as per a KB article to get Airplay going, but in time we do plan to implement Airplay 2 officially which would make things easier.
