The principle of the longterm play is to have more time to think. Thus, the use of an analysis module (Stockfish, Komodo, Fritz, etc.) removes much of the interest in this practice. Worse, if a player is "assisted" by an analysis module while his opponent does not use it, it is simply cheating.
However, if several players wish to compete "assisted" by an analysis module, we suggest that they create a sub-account reserved for this purpose by ticking the box: "I am using an analysis program to play with this username." By doing so, an icon will appear next to your username to indicate that you are playing "assisted" by a module.