ah, thanks for explaining.
I can't see any way to do this. The behavior of these grants are outlined in the RFC, so are pretty limited in flexibility. It looks like auth0 allows something similar to this, so I'm guessing it's not against the spec.
I looked through some code and didn't find support for that. Can you please file an feature request outlining your use case? https://github.com/fusionauth/fusionauth-issues