Tam ne yapmaya çalıştığını anlamadım fakat @Schizophrenia ' nında dediği gibi mantık şu şekildedir incele istediğin doğrultusunda düzenle.

<?php 
require_once("db.php"); 

mysql_select_db($database_uyeler, $uyeler); 
$query_uyeler = "SELECT smf_members.id_member, smf_members.member_name, smf_shop_inventory.ownerid, smf_shop_inventory.itemid, smf_shop_items.id, smf_shop_items.price, smf_shop_items.name 
FROM smf_members, smf_shop_inventory, smf_shop_items 
WHERE smf_shop_items.id = smf_shop_inventory.itemid 
AND smf_shop_inventory.ownerid = smf_members.id_member"; 
$uyeler = mysql_query($query_uyeler, $uyeler) or die(mysql_error()); 
$row_uyeler = mysql_fetch_assoc($uyeler); 
$totalRows_uyeler = mysql_num_rows($uyeler); 

?> 
<table width="auto" border="0"> 
  <tr> 
  <?php if($row_uyeler['id_member']==34 || $row_uyeler['id_member']==18 /*|| bla bla ||*/) { ?>
    <td><b><?php echo $row_uyeler['name']; ?></b> <small>(<?php echo $row_uyeler['price']; ?><img src="coin.png"/>)</small> :</td> 
    <td><?php echo $row_uyeler['member_name']; ?></td> 
	<?php } ?>
  </tr> 
  </table> 
<?php 
mysql_free_result($uyeler); 

?>