Miguel - In Clarizen there are four roles: PM - The person responsible for delivering the project, Manager (Work Item - Mgr) - Someone that is assisting the PM and has been designated a phase or 'chunk' of work to manage, Reviewer - A licensed user that has "read-only" access to the project plan and Resource - The individual responsible for updating the progress of the task(s).
The lifecycle state you refer to is considered a part of Project Scope and only the PM and designated Manager are allowed to change/edit scope. Resources are only allowed to and are responsible for updating the progress of their assigned tasks. If you'd like the resource to also be able to edit 'scope' e.g. Start/Due dates, Work, Duration and Lifecycle state then that person should also be assigned as the Manager for that Work Item.