myuser  Cleartext-Password := "mypass", NAS-IP-Address == "192.168.2.1"

usernane='myuser', attribute='Password', op=':=', value='mypass'
username='myuser', attribute='NAS-IP-Address', op='==', value='192.168.2.1'

ALTER TABLE radcheck ADD site_id VARCHAR(30) NOT NULL default '0.0.0.0' AFTER value;

authorize_check_query = "SELECT id, username, attribute, value, op, site_id, valid_from, valid_until
  FROM ${authcheck_table}
  WHERE username = '%{SQL-User-Name}' AND site_id='%{NAS-Identifier}'
  ORDER BY id"