public $hasMany = array(                
    'Detail' => array(
        'className' => 'Detail',
        'foreignKey' => 'user_id',
        'dependent' => true,
        'conditions' => '',
        'order' => 'created DESC',          
    ),      
    'Category' => array(
        'className' => 'Category',
        'foreignKey' => 'user_id',
        'dependent' => true,
        'conditions' => '',
        'order' => 'created DESC',          
    ),
    'Favorite' => array(
        'className' => 'Favorite',
        'foreignKey' => 'user_id',
        'dependent' => true,
        'conditions' => '',
        'order' => 'created DESC',          
    )

);

----------------------------------
<?php
class User extends AppModel {
    public $actsAs = array('Containable');
}

$users = $this->User->find('all', array(
           'contain'=>array(
                 'UserDetail',                                                                
                 'Category'=>array(
                       'conditions'=>array('Category.user_category_id'=>1)
                  ),
                 'Favorite'=>array(
                       'conditions'=>array('Favorite.member_id'=>8)
                  )
              )
          );
$this->set('test', $users);

By Joins

$users = $this->Item->find('all', array(
            'joins' => array( 
                        array( 
                            'table' => 'categories', 
                            'alias' => 'Category', 
                            'type' => 'inner',  
                            'conditions'=> array('Category.user_category_id' => 1) 
                        ), 
                        array( 
                            'table' => 'favorites', 
                            'alias' => 'Favorite', 
                            'type' => 'inner',  
                            'conditions'=> array('Favorite.member_id' => 8, 'User.id = Favorite.user_id') 
                            )
                        ),
           'contain'=>array('ItemDetail','Category','Favorite')
          );
$this->set('test', $users);

Another Method
$this->Item->hasMany['Favorite']['conditions']['member_id'] = 8;

rollback to the previous behavior, you need to unset the condition:

unset($this->Item->hasMany['Favorite']['conditions']['member_id']);

------------------------------------------------------------------------

$this->bindModel(array(
    'hasMany' => array(
        'Comment' => array(
            'conditions' => array('Comment.comment_type_id' => 123)
         ))));
$this->find('all');

Model is already binded with comment use :

$this->hasMany['Comment']['conditions'] = array('Comment.comment_type_id' => 123);
$this->find('all');