The Anacharis if freefloating will sink to the bottom and start growing again in the spring. For the lily you can wait until it starts turning yellow or after the first killing frost, trim the foliage back to a few inches from the surface of the pot and sink it to the bottom of your pond. As for the Jungle Vallisneria, I wasn't familiar with it, but I googled it and it is hardy to zone 4, so you can sink that to the bottom if it isn't already and it should do OK. Best to trim off any dead leaves as decaying leaves produce ammonia that is harmful to the fish.