Workflow permissions documentation

Hi everyone,

I'm having some difficulty while setting up a group permission for workflow. I have looked in several workflow documentation from Adobe but nothing helped me out on this matter.

I want to have a group that can start workflows but this group should not be able to complete,stepback or even see (if possible) these workflows in the inbox.

To start the workflow was simple. I setup /etc/workflow as read,write,modify,delete. Now I'm struggling to find the option to make it not visible in the inbox.

Can anyone give me a hint ? or a documentation with actual information on this matter ? 

Thank you :)