function my_picu_list_collections_args( $args ) {

	if ( isset( $current_user->user_email ) ) {

		$args['meta_query'] = array(
			'relation' => 'AND',
			array(
				'key' => '_picu_collection_email_address',
				'value' => $current_user->user_email
			)
		);
	}

	return $args;
}

add_filter( 'picu_list_collections_args', 'my_picu_list_collections_args' );

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