We have 2 partitions, In general PM can see only his own projects (or where is as team member).
We need to set dependency between projects across partitions. Example CentralPMO and IT partition. IT projects are sometimes as subprojects of CPMO master projects.
PM from CPMO is Participant of IT project so he can see IT project but he is not able to set dependency on task level. Because he cannot see tasks.from IT subproject.
Requirement is for PM from CPMO to see only projects which are subprojects of his Master project and to have possibility to set dependecies between.