How to make field readonly based on group and status?

Question

I want to make field readony based on group, and status.

Like i have two grops 1. Manager Group 2. User Group

If I give User Group to any <

Answer 1

you can apply access rule on field level in OpenERP, like in py

'name': fields.char('Name', size=128, required=True, select=True,
 read=['base.group_user'] ),

And for status in xml: