By default, Formidable user meta appears at the bottom of a user profile page. Use this code example to hide it.

add_filter( 'frmreg_show_meta_on_profile', '__return_false' );

add_filter( 'frmreg_show_meta_on_profile', 'hide_meta_for_specific_user', 10, 2 );
function hide_meta_for_specific_user( $show, $user_profile ) {
	$target_user_id = 43; // Replace 43 with the ID of the User ID field.
	if ( $user_profile instanceof WP_User && $target_user_id === $user_profile->ID ) {
		$show = false;
	}
	return $show;
}