How can I provide the authorized_keys path in sshd that allows normal users, system users, and a root user?

Is it possible to set the AuthorizedKeysFile setting explicitly such that it covers the following cases: 1. standard user under /home/%u/.ssh/authorized_keys 1. system user under /var/lib/%u/.ssh/authorized_keys 1. root user under /root/.ssh/authorized_keys My question is, is there a variable that contains the user directory as specified in the Name Service Switch ?