code: public synchronized static String getLocalizedProperty(final String namespace, final String key, final String defaultValue) {
      if (namespace == null || namespace.equals(""))
        return getProperty("", hostname + "." + key, defaultValue);
      return getProperty(hostname + "." + namespace, key, defaultValue);
    }
docs: Allows retrieval of localized properties set up for SPECIFIC hosts. Calling
  getLocalizedProperty("foo.bar.BLAH") on the machine 'wintermute' is
  equivilant to doing getProperty("WINTERMUTE.foo.bar.BLAH"). Machine names
  are always uppercase, and never have sub-domains (ie WINTERMUTE and not
  WINTERMUTE.PELZER.COM)