That's not a current requirement for our internal project, so hasn't been implemented. I have looked at the package from stancl/tenancy as well as spatie for another project, and it looks like it wouldn't be too challenging.
The project was sitting at about 65-70% done when Laravel 8 was pushed out a couple weeks ago, and I haven't revisited the tenancy aspect since then to know if there is anything new and shiny in there or not.