It is possible, but not without doing some PHP coding. There is a filter footballpool_statistics_matchpredictions that you can use to filter out the unneeded predictions.
On which page should I make this adjustment?
With the given filter you can change the output without touching the plugin code. You can add code to your theme’s function file or write an extension. More info can be found on the help page.
This filter is there to filter in the page. Is there also an option not to show users from another pool?
I think it will be possible to only show users from one pool, but then you’ll have to investigate every page, shortcode and widget that shows users for any hooks that you can use to filter out the users from other pools.
There is not 1 option that can be simply enabled, it requires several pieces of custom code that hook into the plugin’s functionality. But, as said, I think it can be done.
