## Other Services
-The `systemd` project provides two other services implementing this
+The `systemd` project provides three other services implementing this
interface. Specifically:
1. `io.systemd.DynamicUser` → This service is implemented by the service
and provides records for the users and groups defined by the home
directories it manages.
+3. `io.systemd.Machine` → This service is implemented by
+ `systemd-machined.service` and provides records for the users and groups used
+ by local containers that use user namespacing.
+
Other projects are invited to implement these services too. For example it
would make sense for LDAP/ActiveDirectory projects to implement these
interfaces, which would provide them a way to do per-user resource management