In creating new task on a project, phases of other projects are shown

When creating a new task on an existing project (see [1]), the phases of other projects are shown and selectable. This should not be possible. A project manager may only create tasks for the projects he is managing, and should only be able create tasks for phases in another project when he is in a project.

[1] https://demo-trunk.ofbiz.apache.org/projectmgr/control/EditProjectTasks?projectId=9000