The ornamental design for a sealingmember for an artificial limb, as shown and described.
FIG. 1 is a perspective view of a sealing member for an artificial limb in accordance with our design.
FIG. 2 is a front side view thereof, it being understood that the left side view, the right side view and the rear side view are each identical thereto; and,
FIG. 3 is a top side view thereof, it being understood that the bottom side view is identical thereto.