$installer = $this;

$installer->startSetup();

$installer->addAttribute('customer','badge', array(
'label'             => 'Badge',
'type'              => 'text',    //backend_type
'input'             => 'multiselect', //frontend_input
'backend'           => 'eav/entity_attribute_backend_array',
'global'            =>  Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
'source'            => 'marketplace/eav_entity_attribute_source_badge', // Goes to Step 2
'visible'           => true,
'required'          => false,
'default'           => '',
'frontend'          => '',
'unique'            => false,
'note'              => ''
 ));
 ));
 Mage::getSingleton('eav/config')
   ->getAttribute('customer', 'badge')
   ->setData('used_in_forms', array('customer_account_create','customer_account_edit','customer_address_edit','checkout_onepage_register','checkout_onepage_register_guest','checkout_onepage_billing_address','adminhtml_customer','checkout_onepage_shipping_address','checkout_multishipping_register'))
   ->save();
$installer->endSetup();

class Company_Marketplace_Model_System_Config_Source_Badge extends Mage_Eav_Model_Entity_Attribute_Source_Abstract
{
protected $_options;

public function toOptionArray()
{

    $collection = Mage::getModel('marketplace/badge')->getCollection();
    $allattributes = array();
    foreach($collection as $data)
    {
        $allattributes[] = array('value' => $data->getBadgeName(),   'label' => $data->getBadgeName());
    }

    return $allattributes;
}

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