The plugin doesn't support hiding fields by user roles/IDs. You can try to add your own JS callback or use Meta Box Include Exclude extension. This extension works with user roles/IDs, but works for showing/hiding meta boxes, not fields.
Hi, thanks for your response,
but i am not talking about hiding and showing, it's about readonly or disabling the modifying ability for some users, they still need to see the information on fields without modification !