Redirect Admin or User After Login

UNTUK ADMIN
That's possible using the filter wp_login. In this example, the redirection occurs if the user has the administrator capability.

add_action( 'wp_login', 'so_14005301_redirect_admin_login', 10, 2 );
function so_14005301_redirect_admin_login( $user_login, $user )
{
    if( array_key_exists( 'administrator', $user->caps ) )
    {
        wp_redirect( site_url( 'new-admin/', 'http' ), 301 );
        exit;
    }
}

Code reference:

function site_url
wp_login hook
function array_key_exists

====================
UNTUK USER:

WP_User Object
(
    [data] => stdClass Object
        (
            [ID] => 1
            [user_login] => my_name
            [user_pass] => $P$BAdksWhVu4gZlZPZnv0m/VuUjsS3/Z0
            [user_nicename] => my_name
            [user_email] => [email protected]
            [user_url] =>
            [user_registered] => 2012-12-15 12:12:20
            [user_activation_key] =>
            [user_status] => 0
            [display_name] => my_name
        )

    [ID] => 1
    [caps] => Array
        (
            [administrator] => 1
        )

    [cap_key] => wp_capabilities
    [roles] => Array
        (
            [0] => administrator
        )

    [allcaps] => Array
        (
            [switch_themes] => 1
            [edit_themes] => 1
            [activate_plugins] => 1
            [edit_plugins] => 1
            [edit_users] => 1
            [edit_files] => 1
            [manage_options] => 1
            [moderate_comments] => 1
            [manage_categories] => 1
            [manage_links] => 1
            [upload_files] => 1
            [import] => 1
            [unfiltered_html] => 1
            [edit_posts] => 1
            [edit_others_posts] => 1
            [edit_published_posts] => 1
            [publish_posts] => 1
            [edit_pages] => 1
            [read] => 1
            [level_10] => 1
            [level_9] => 1
            [level_8] => 1
            [level_7] => 1
            [level_6] => 1
            [level_5] => 1
            [level_4] => 1
            [level_3] => 1
            [level_2] => 1
            [level_1] => 1
            [level_0] => 1
            [edit_others_pages] => 1
            [edit_published_pages] => 1
            [publish_pages] => 1
            [delete_pages] => 1
            [delete_others_pages] => 1
            [delete_published_pages] => 1
            [delete_posts] => 1
            [delete_others_posts] => 1
            [delete_published_posts] => 1
            [delete_private_posts] => 1
            [edit_private_posts] => 1
            [read_private_posts] => 1
            [delete_private_pages] => 1
            [edit_private_pages] => 1
            [read_private_pages] => 1
            [delete_users] => 1
            [create_users] => 1
            [unfiltered_upload] => 1
            [edit_dashboard] => 1
            [update_plugins] => 1
            [delete_plugins] => 1
            [install_plugins] => 1
            [update_themes] => 1
            [install_themes] => 1
            [update_core] => 1
            [list_users] => 1
            [remove_users] => 1
            [add_users] => 1
            [promote_users] => 1
            [edit_theme_options] => 1
            [delete_themes] => 1
            [export] => 1
            [administrator] => 1
        )

    [filter] =>
)