Yes, but a small subset of the GrapheneOS features are enhancements to user profiles and Private Space. We enable more of the standard user profile functionality that's usually not available (such as ending secondary user sessions or toggling them running the background) and add extra features such as notification forwarding. For Private Space, we enable making them in secondary users instead of only Owner and provide control over clipboard sharing instead of it always being shared with the parent profile (the user it's nested in).

Our more prominent 2-factor fingerprint authentication feature is also relevant when switching between users a lot.

The only thing I don't like from private space is that all notifications from apps inside private space are hidden. Wish that was configurable. I use private space for containerization, not to hide things.