Documentation for the Trading Partner Manager (TPM) covers the Lobster perspective and the partner perspective.
Introduction: Trading Partner Manager: architecture and how it works
The page Trading Partner Manager: setting up channels with partners shows three perspectives: a Lobster Data Platform (LDP) user, an LDP user on the Trading Partner Manager, and a partner user on the Trading Partner Manager.
The page Trading Partner Manager (partner view) covers only the perspective of a partner user on the Trading Partner Manager.