Okay this is a bit tricky, you can get the current page name (menu name) and then make if statements for each "page" you made in the template source, i'll give an example ... Let's say you have a contact page and you want to add a position to it if the user is on the contact page ...
<?php
$currentpage = JSite::getMenu()->getActive()->name ;
// in joomla 2.5
$currentpage = JSite::getMenu()->getActive()->title;
if($currentpage == "Contact"){
echo '<jdoc:include type="modules" name="Contact" />';
}
?>
And so you have to workout your whole template and anticipate for each page, this was a simple example and it's up to you to expand it ...