Excluding users on author list page

Is it possible to exclude users from an author page? Below is the code for the page:

<?php

// Template Name: Authors List

get_header(); ?>
<style type='text/css'>
.author {  }
.author h3 { margin-bottom: 10px; }
.author .description { overflow: hidden; }
.author .description p { margin: 0; }
.author .avatar { }
.author h4 { font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	font-size: 21px;
	color: #145A84;
	text-align: left;
	margin: 0px;
	padding: 0px;
	line-height: 21px; }
.author .connect { border-top: 1px solid #ccc; border-bottom: 1px solid #ccc; list-style: none; margin: 0; padding: 0; width: 100%; overflow: hidden; padding: 10px 0px; }
.author .connect li { float: left; margin-right: 20px; }
</style>

<div class="maincontent" id="maincontent">
<div class="latestentries" id="latestentries">
<div class="contentheader" id="contentheader">
<div class="colorblock" id="colorblock"></div>
<span class="typepadding">CONTRIBUTORS</span></div>

<div class="entry" id="entry">
<?php

		$authors = $wpdb->get_results('SELECT DISTINCT post_author FROM '.$wpdb->posts);
		if($authors):
		foreach($authors as $author):

	?>

<div class='author' id='author-<?php the_author_meta('user_login', $author->post_author); ?>'>

<div class="posticonbox" id="posticonbox"><?php echo get_avatar(get_the_author_meta('user_email', $author->post_author), 50); ?></div>

<div class="post" id="post">
<h4><?php the_author_meta('display_name', $author->post_author); ?></h4>
<?php if(get_the_author_meta('description', $author->post_author)): ?>

<div class='description'>
<p><?php the_author_meta('description', $author->post_author); ?></p>
</div>

<?php endif; ?>

  <?php

			$recentPost = new WP_Query('author='.$author->post_author.'&showposts=1');
			while($recentPost->have_posts()): $recentPost->the_post();
			?>
<br />
<ul>
<li>Recent Post: <a href='<?php the_title();?>'><?php the_title(); ?></a></h4></li>
<li">view all posts by <?php the_author_posts_link(); ?></li>
</ul>

<p></p>
 <?php endwhile; ?>

<?php if(get_the_author_meta('twitter', $author->post_author) || get_the_author_meta('facebook', $author->post_author) || get_the_author_meta('linkedin', $author->post_author) || get_the_author_meta('digg', $author->post_author) || get_the_author_meta('flickr', $author->post_author)): ?>

<ul class='connect'>
<?php if(get_the_author_meta('twitter', $author->post_author)): ?>
<li class="ulstyle"><a href='https://twitter.com/<?php the_author_meta('twitter', $author->post_author); ?>'>Twitter</a></li>
<?php endif; ?>

<?php if(get_the_author_meta('facebook', $author->post_author)): ?>
<li class="ulstyle"v><a href='https://www.facebook.com/<?php the_author_meta('facebook', $author->post_author); ?>'>Facebook</a></li>
<?php endif; ?>

<?php if(get_the_author_meta('linkedin', $author->post_author)): ?>
<li class="ulstyle"><a href='https://www.linkedin.com/in/<?php the_author_meta('linkedin', $author->post_author); ?>'>LinkedIn</a></li>
<?php endif; ?>

<?php if(get_the_author_meta('digg', $author->post_author)): ?>
<li class="ulstyle"><a href='https://digg.com/users/<?php the_author_meta('digg', $author->post_author); ?>'>Digg</a></li>
<?php endif; ?>

<?php if(get_the_author_meta('flickr', $author->post_author)): ?>
<li class="ulstyle"><a href='https://www.flickr.com/photos/<?php the_author_meta('flickr', $author->post_author); ?>/'>Flickr</a></li>
<?php endif; ?>
</ul>

<?php endif; ?>
<div class="border" id="border"></div>

</div>

<?php endforeach; endif; ?>

</div>
</div>
</div><!--end post-->
<div>
</div>
</div></div>

<?php get_sidebar(); ?>
<?php get_footer(); ?>