Thanks for your prompt input Unclegeo, greatly appreciated - actually I make it a double whammy as, although I knew about the pluginGROUP, I didn't know how to add a new icon to the tool bar of the wiki source editor - this is a great tip indeed - so thanks again
This is indeed a possible route which I have explored a bit already but although it gives the desired results, it is non dynamic, I mean by this that you have to add the links in the correct group section on the wiki page containing the plugin manually and this each time you create a new wiki page.
Unless I am missing something - which is very likely possible, this direction is OK for a small amount of pages and groups and would in my case not be useable long term.
So what I am after really, is a way to get similar results as the one given by the pluginLIST when used with the categorie filter but instead of having the result filtered by categories, have it filtered by groups - is there a way to achieve this kind of results without having to hack in the pluginLIST or worst having to write a specific plugin?
Thanks again in advance for any other pointers sent my way.
PS: Re-reading my OP, I think it was misleading and not very clear - lets hope I have done a better job this time