Tenants are allowed to have guests. If the tenants in your building are inviting, or allowing the former superintendent onto the property that is not considered trespassing and you have no say in the matter. However, if there are pending criminal proceedings, restraining orders, peace bonds or bail conditions that may be preventing him from accessing the property, then that is not really a landlord and tenant matter, and is therefore beyond the scope of our mandate. Perhaps you should consult a criminal lawyer in such circumstances.