Multiple loops in the same page
<?php
// this is for customer posts
$args = array(
'post_type' => 'customer'
);
$the_query = new WP_Query( $args );
?>
<?php if ($the_query->have_posts()) : ?>
<?php while ($the_query->have_posts()) : $the_query->the_post(); ?>
<?php // loop here
the_title();
the_content(); ?>
<?php endwhile;
wp_reset_postdata();
else : ?>
<p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>
<?php endif; ?>
<?php
// This is for projects posts
$args = array(
'post_type' => 'projects'
);
$the_query = new WP_Query( $args );
?>
<?php if ($the_query->have_posts()) : ?>
<?php while ($the_query->have_posts()) : $the_query->the_post(); ?>
<?php // loop here
the_title();
the_content(); ?>
<?php endwhile;
wp_reset_postdata();
else : ?>
<p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>
<?php endif; ?>
You can also mix the posts like this
'post_type' => array('customer', 'projects'),