In TCP you are able to view the 'connections' each named user has to each entity/deliverable, and within each entity, each field. Since there are many fields in TCP where users are named (e.g. report recipient, responsible party, business requirement owner, etc) the purpose of this is to view the way this particular user is identified throughout the system so it is clear at-a-glance how the person you are viewing is involved in the project deliverables.
An identical view is offered for individuals seeking to know only their own connections. In the 'Common' area of the Project Dashboard a single click will show you all of your involvement in the project, and further allow click-through into any of the deliverables shown.