I've multiple metaboxes during my posts. Can you really obtain the names and values of fields owned by one metabox?

I am presently utilizing a loop that will get the values of fields but I have to ask them to in sections according to metaboxes.

  $custom_field_keys = get_post_custom_keys();
  foreach ( $custom_field_keys as $key => $value ) {
    $valuet = trim($value);
      if ( '_' == $valuet{0} )
      continue;

      echo get_post_meta($post->ID, $value, true);
      echo "<br />";
  }