Take a look here for a bed canopy mosquito net project. Discusses the difficulty of sewing the netting.
Some small hints here:
(the hint is getting the tension "set properly".)
Has one sentence on use of cotton tape sewn to the edge of the mosquito netting.
Maybe a good trick is to sew the mosquito netting to something ("backing") that can take pins, like cotton tape or paper, and use pins to first sew the netting to the "backing" and then pin and sew together a "baacking"+netting to another "backing"+netting or just a second netting with the backing holding the pins for everything. If the backing is paper, it will come out in the wash, well, sorta.
I eventually plan to sew some netting up, so if you figure it out, please let me know.