Allows participant to enrol in future sessions of the same experiment?. Using this property the system can be set up such that the assignment of states like
researcher-cancelleddo not prevent a subject from enrolling in other sessions of the same experiment. However, the implementation of such flexibility at the database level is pretty difficult, because the system has to make sure that no participant participates twice in any experiment. So this will be a feature coming with a major new version of ORSEE.