Sure,
Consider this setup, where the train has a schedule like this.
After the train leaves the 'Supply' station, it will be given supply network 1, as determined by the depot signal. The mod will then check what cargo the train has, and then attempt to locate a station that 'wants' the train's cargo, which you indicate via a negative signal for that resource. The station must also be in the same network, which is indicated by the skip signal. Since the 'Demand' station meets both those requirements, it will be automatically added to the train's schedule along with a temporary stop, and the conditions will be copied from the **next station in the schedule (in this case, the one named 'Random'). After leaving the Demand station, the demand stop will be removed from the train's schedule.
Now, a vanilla wagon will hold 2000 ore. That means the train will deliver twice, at which point the station will only be receiving a signal of -1000 iron ore because the chests are also connected to the train stop. Which means the 3rd time the train leaves the supply stop, there will no longer be any eligible stations for the mod to add to the train's schedule, and it will proceed as normal, resulting in this train just looping between 'Supply' and 'Random'.
Hope that clears things up :)