Each image has an image ID, you use this ID to get the custom fields.
Example:
foreach ($images as $image) {
$value = get_field('your custom field name', $image['ID']);
);
or something like:
foreach ($images as $image) {
?>
<a href="<?php the_field('your link field name here', $image['ID']; ?>">something here</a>
<?php
);