list all WP users in custom meta box

howdy. I’m trying to list all my WP users in a custom post type via a custom meta box. The code I have is below which works but it’s not even close to what I need since the options are static. I need to have a dynamically generated list of checkboxes with one checkbox per WP user…

$meta_boxes[] = array(
	'id' => 'client_meta_boxes',
	'title' => 'Owners',
	'pages' => array('clients'),
	'context' => 'normal',
	'priority' => 'high',
	'fields' => array(
		array(
			'name' => 'Owner Name',
			'id' => $prefix . 'owners',
			'type' => 'select'
		)
	)
);

I tried to throw a foreach statement in there but to no avail. Any help would be appreciated.