Goal is to have a page (node) that shows up when you are not logged in, and is hidden when you are.

Policy.yaml

#                                                                        #
# Security policy for the TYPO3.NeosDemoTypo3Org package                 #
#                                                                        #

privilegeTargets:

  'TYPO3\TYPO3CR\Security\Authorization\Privilege\Node\ReadNodePrivilege':

    'TYPO3.NeosDemoTypo3Org:RegisterPage':
      # e5335cad-2647-db8a-c15d-a5d69cf0d612 is the node identifier of the "register" node
      matcher: 'isDescendantNodeOf("e5335cad-2647-db8a-c15d-a5d69cf0d612")'
roles:

  'TYPO3.Flow:Everybody':
    privileges:
      -
        privilegeTarget: 'TYPO3.NeosDemoTypo3Org:RegisterPage'
        permission: GRANT


  'Flowpack.Neos.FrontendLogin:User':
    privileges:
      -
        privilegeTarget: 'TYPO3.NeosDemoTypo3Org:RegisterPage'
        permission: DENY

  'TYPO3.Neos:Editor':
    privileges:
      -
        privilegeTarget: 'TYPO3.NeosDemoTypo3Org:RegisterPage'
        permission: GRANT