Start instance of process from user experience
- Set your users in the Portal, create groups and roles if necessary (at least, a group "All"), as an admin.
- Add applications (process) and set the user right (who can start it - you can assign a group, a role, a user as you want).
- When a user log in the Portal, he/she will see the application in the "Apps" tab on the top menu, if he/she has the good rights
Does this help ?