D7 hook_block_info角色控制block

$blocks = array();
//Block for the Normal Site Owners
$blocks['payouts'] = array(
    'info' => t('Listing of Payouts'),
    'cache' => DRUPAL_NO_CACHE,

);
//Block for the Administrators
$blocks['commission_payments'] = array(
    .....
            .....
);

function hook_block_view($delta = '') {
  global $user;
  $block = array();

  switch ($delta) {
    case 'payouts':
      if (in_array('Admin', array_values($user->roles))) {
        $block['content'] = t('Hello Admin');
      }
      break;

    case 'commission_payments':
      if (in_array('Site Owner', array_values($user->roles))) {
        $block['content'] = t('Hello Site Owner');
      }
      break;
  }

  return $block;
}