Just want to submit field values
$user_ids = array(1, 2, 3, 4, 5, 6); // This will be dynamic based on your users

foreach ($user_ids as $uid) {
  // Your form element goes here
  $form['field_user_value_' . $uid ] = array(
    // form elements
  );
}


In your submit function you have above values

$values = $form_submit['values'];

foreach ($values as $key =&gt; $values) {
  if ($substr($key, 0, 17) == "field_user_value_") {
    // Push values to database
  }
}