Hi mansim,
One solution of your problem could that, you can store your the form data in a pdf/text format in jcr and pass this URL to the inbox of second group.
Second group can see check the value and if it is greater then particular vaule it can pass the request to third group or can complete the task.
Note : you can customize http://localhost:4502/inbox console and add a custom tab. Pass the value of form url to this tab
Hope it's useful !!!