The MacPorts PortMgr team is the steering group for The MacPorts Project. Its membership is usually determined by public elections among project members; the current members of the team can be found on the MacPorts Developers wiki page.
They are responsible for matters such as:
approving new project members (i.e., granting commit rights);
setting general guidelines for the project;
dispute resolution;
managing the projects infrastructure; and
engineering releases.