Filter example: remove a modal when user is logged in.

filter_remove-my-modal.php

<?php

add_filter('emodal_print_modals', 'remove_my_modal');
function remove_my_modal($modals)
{
	$id_of_hidden_modal = 2;//The id of your modal.
	if(is_user_logged_in())
	{
		unset($modals[$id_of_hidden_modal]);
	}
	return $modals;
}