Looking at the gnome-shell code, there is nothing to lockdown the "log in as another user" button on the lock screen. It appears to only remove the "Switch User" item from the system menu.
can you file an upstream bug at bugs.gnome.org for this one, and report back the bug number here so we can link it to this bug! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1712548 Title: Gnome 3 lock screen does not respect org.gnome.desktop.lockdown disable-user-switching To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1712548/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
