First finish the edge with a binding strip. Then tape the lace motif on top of the edge and sew with narrow zigzag along the inner edges of the lace motif. Shape the top edge of the camisole if necessary to match the shape of the lace. Apply a lace motif to the hem, too, like in the sample garment. If the lace is very soft or slack, sew clear elastic to the wrong side of the top edge of the lace.
First machine baste it to the wrong side of the lace.
Stretch the elastic when basing. Then zigzag on the right side on the elastic. If the binding fabric is not elastic enough, you can apply invisible elastic in the binding seam.