This post is the answer to a question asked by Ian Hill in a comment to my previous post:

Is there a similar way to stop custom functions (especially beforeSave()) from being called in your model?

I hope I understood the question correctly and the following example answers the question ;-)

// app/app_model.php
class AppModel extends Model
{
    function beforeSave()
    {
        if ($this->name != 'MyModel')
        {
            // execute beforeSave logic
        }
        return true;
    }
}