@Russ Thanks for the clarification. That was my understanding as well - to share TRIGGERcmd for all, either everybody has to use Voice Match or nobody can use it. Unfortunately, the children really want to use the Voice Match (required to teach Google Home important things such as names of our cats etc) while both me and my wife are strictly against Voice Match for us. That means that the children could share TriggerCMD but no solution for the adults. And we'd need TriggerCNS exactly mainly for the adults...
I understand it's a relatively specific situation though, so probably no solution will be available. I was hoping for something similar to Spotify (that works also for non-VoiceMatch members of the household) but I understand it may be difficult to achieve. Thanks for your efforts anyway!