By default, the owner of a test session is the project member who started the test session. This field cannot be edited.
To view the owner of a test session, navigate to the Test Coverage primary tab and then to the Builds secondary tab. For the specific build, click on the test session icon on the right side vertical menu. This will expand to show the list of test sessions, and the owner will be listed below the test execution status. Alternatively, you can also click on the specific test session and the owner will be listed on the right side under the test execution status.
Users will need view permissions in the test coverage module to view the test session owner. Depending on the settings of a users project permissions, users may be able to view all project builds or just a subset of them. Project owners manage the permissions for project members.