Dennis @ PerfectForms
The state of objects (such as fields) can be controlled based on the workflow stage and Role of the user. In other words, you can make a field hidden or visible based on who is viewing the form and when. Please refer to our help guide for assistance on the topic: /Documentation/manual/html/?fa_setting_field_state_scenarios.htm.
I also suggest watching the video about workflow that can be found for free at: /training.php.