Don't show author if one of

[babyglove]

I'm trying to not show meta for an author based on is not user_nicename. The code below only works if there is just one user - how would I add another user to the code, so their meta is not shown as well? 

<?php if(get_the_author_meta( 'user_nicename')!='user1') : ?><div class="author clearfix">
       <div class="author-gravatar">
           <?php echo get_avatar( $post->post_author, 64 ); ?>       
       </div>
       <div class="author-about">
        <h4>
        <?php if(get_the_author_meta( 'first_name') != ''  &&  get_the_author_meta( 'last_name') != '' ) : ?>
            <?php the_author_meta( 'first_name'); ?> <?php the_author_meta( 'last_name'); ?> 
      <?php else: ?>
          <?php the_author_meta( 'user_nicename'); ?> 
      <?php endif; ?>
      </h4>
           <p class="author-description"><?php the_author_meta( 'description' ); ?></p>
       </div>
   </div><?php endif ?>