Can Christians be demon possessed?

Can Christians be demon possessed? In this Christian theology podcast, Michael Miller and Joshua Lewis discuss demonology. Specifically the activity the daemonic has in the life of the believer. Can Christians be possessed? What level of activity is demonic powers allowed in the life of a Christian? Can Christians rest in security, or should we always be vigilant and aware of the enemies devices? I am not sure we settled the "can Christians be possessed debate" but I think we gave both sides...