If you are a site or project administrator, you can set permissions on form logs (business processes) by selecting the "Options" link within the form log (up at the top of the form log). Depending upon the workflow, you will see several different tabs which allow you to set who can create a form, who can respond, etc. You can also determine if a project member can view all forms or only the ones in which the user is an active participant (e.g. if they receive a form, respond, etc).