Block display using wildcard, non-greedy
Note that you can use arg(x) where x is the position in the path starting from 0, so you could do something like this as well:

&lt;?php
if (arg(0) . arg(1) == 'commerce_storestore' &amp;&amp; !arg(3)) {
  return TRUE;
}
?&gt;


You could also use drupal_match_path() like so: 

&lt;?php
if (drupal_match_path(current_path(), "commerce_store/store/*") &amp;&amp; !arg(3)) {
  return TRUE;
}
?&gt;


Cheers,