Ashley Lawrence has signed with Paris Saint-Germain through the 2019 season:
http://www.psg.fr/en/News/003001/Art...-Saint-Germain
Meanwhile, it is heavily rumoured that Kadeisha Buchanan will be signing with Olympique Lyonnais. Nothing has been officially announced yet.
I would have to think that these two signings are the biggest in Canadian women's history.