Hi,

To achieve the functionality you can add the specific user group to the field

eg:

<field name="credit_info" groups="module.user_group/>

please refer  the below blog to know about security groups

Security Groups & Access Rights in Odoo

Hope it helps

As no-one else has responded, here are some thoughts that might help.

You would have to create a new user access group that is NOT part of the Accounting application. The simplest way is to make it part of the technical access group. 

It will not appear in the UI so you'd have to manually add users from the group:

Then you could limit access based on this new Access Group.

If you are planning on using Odoo Studio to limit access to the field in the Form View , you should upload the new group and give it an External ID (creating it through the UI doesn't do that).