Example of how dynamic hook registration could be implemented http://drupal.stackexchange.com/questions/53210/dynamic-hook-registration

dynamic_hook_registration.php

function mymodule_pre_hook(){
    register_hook( 'mymodule_form_foo_node_form_alter', 'mymodule_handle_nodetype_form_alter' ); 
    register_hook( 'mymodule_form_baz_node_form_alter', 'mymodule_handle_nodetype_form_alter' ); 
}
 
function mymodule_handle_nodetype_form_alter( &$form, &$form_state, $form_id ){
  //do what you need
}