|Out of universe information|
Porro was a Lieutenant in the United States Air Force and a member of the team that went through the Stargate on the initial trip to Abydos. He stayed with the basecamp team. When the team was ambushed by Ra's Horus Guards, Porro was killed. His body was deposited with the other team members who were merely incapacitated. (Stargate)
He may have been named for costume designer Joseph Porro, who was nominated for an award for his costume design in Stargate.