Yes Callistemon, the sponsor at Confirmation does not need to be the godparent. There are a few stipulations.
You must choose your sponsor, and your sponsor must be willing to help you lead a Christian life in harmony with your baptism call and fulfill the obligations connected with it.
Your sponsor must be at least sixteen years of age.
Your sponsor must be Roman Catholic, baptized and confirmed, and have received First Communion.
Your sponsor must be practising his/her faith, that is, a faithful Catholic who attends Sunday Mass on a regular basis.
If married, they must be married according to the regulations of the Catholic faith
Your sponsor must be someone besides your parents. The church prefers that the godparents at baptism serve again as the sponsor at confirmation. You may choose
as your sponsor, your brother, sister, godfather, godmother, aunt, uncle, cousin, friend, neighbour who meets these requirements.
Your parents, step-parents,
foster parents, or guardians may NOT act as sponsors.