To my articles I have added tags. On my main page I show the tag cloud by using the k2_mod_tools module.

 

I want to have a module displayed on the page that is displayed when I click on one the tag words.

I jump to a subpage that starts with domain.org/tag/tagkeyword/articlename (I have sh404sef enabled, that's why the sef url).

real url =

../index.php?option=com_k2&lang=en&tag=analyst+view&task=tag&view=itemlist

 

How can I hav this accomplished?

A few choices.  1. Use metamod plugin where you can use php to define when modules are shown (in your case you would say if the task = tag then display module.  2.  You could add a module position in your index.php, add your module to that position and set it to show always.  Then add php in the index.php to only display the module if task=tag.  Maybe someone else knows of an easier way, but that's all I can think of.

The only other thing I can think of is you could publish the module to the "inactive" position and set the Menus to "All", for them to show up on pages where there is no active menu ID. This is a bug/feature of Joomla that causes only menu items in the "All" setting to show up.