Hi,
You could do this :
<?php
acf_form_head();
get_header();
$userID = get_current_user_id();
if (have_posts()) : while (have_posts()) : the_post(); ?>
$options = array(
'field_groups' => array('your_field_group'),
'post_id' => 'user_'.$userID,
'updated_message' => __('Profil updated','your_namespace'), );
acf_form($options);
get_footer();
?>