Only figurines and other things that are considered 3D physical object (unlike tapestry or t-shirts). Their ToS mentions you aren't allowed to sell or display them at events, unless Anycolor has given explicit permission to organizers for this. And if you want to sell it then you should contact organizers of the event, so they contact Anycolor and ask for a permission. You are also not allowed to sell anything if they think you are making a profit on it on a "business scale" and not as a hobby, whatever amount they mean by that.
That aside, Anycolor had an official collaboration with DLSite and many creators pulled their work off of it out of fear of repercussions. They were never told to do so and afaik no one was ever punished for not doing it. Considering DLSite is a go to place to buy doujins for most people, through the game of broken telephone it eventually became "Anycolor doesn't allow to sell doujins at comiket anymore"
