Hi Nishad,

It's way simple than you are thinking. You just have to create multiple one2many fields with different field names and add the domain according to your need.

Reference: MRP

Ex:

draft_lines = fields.One2many('my_obj.obj', 'my_obj_id', domain=[('state', '=', 'draft')], 'Draft Lines')
confirmed_lines = fields.One2many('my_obj.obj', 'my_obj_id', domain=[('state', '=', 'confirm')], 'Confirmed Lines')
cancelled_lines = fields.One2many('my_obj.obj', 'my_obj_id', domain=[('state', '=', 'cancel')], 'Cancelled Lines')

Sudhir Arya ERP Harbor Consulting Services skype:  sudhir@erpharbor.com  website: http://www.erpharbor.com