Ok problem solved:
<?php
<?php
$values = get_sub_field('skupiny');
$current_user = wp_get_current_user();
if ( !($current_user instanceof WP_User) )
return;
$roles = $current_user->roles; //$roles is an array
if (array_intersect($roles, $values))
{ ?>
/// content for selected roles goes here ///
<?php
}
else
?>
