HI. how would one implement in keto // opl as system where a user has permissions. But has to 'activate' his current task. example: For task X he can access A. But for task C he can only access B and no longer A. some users have multple tasks / roles between he can switch. Tasks[A, B] Tasks[A] -> DFG Tasks[B} -> FX If task A is 'active' access to DFG is ok. if taks B is active access to FX should be given.