well after you submit your work, on your right you can see an option saying 'add to groups', you click there, then
click at 'suggest to group favs' and then you type the name of the group you joined and then the group appears and you click at it and you get the names of folders, you choose the appropriate folder for your work.Repeat the process for all the groups you want to submit your work at , and then done
Hope that helps