An update on this !!
The plugin does work as described, i.e. if you enter a url that is restricted by groups, then it will redirect to the page you specify in the 404 redirect plugin.
The confusion for me is that; say you search for a restricted page, the search results will show a 404, content not found.
Would be great if this plugin could be tweaked so that if a restricted page is searched for by someone who doesn’t have permission to access it, then the search results still show the link to the page, but on clicking the link the browser is redirected to the 404 redirect page.
A bit long winded, but hope this makes sense.
Perhaps a pro version with this capability ?
Thanks