Codeforces provides a nice facility of seeing friend's standing during contest.
There is also another option in the rating page that is filtering users according to "country", "Organization" and "City"
But in the standing page it can be filtered only by "Friends". If the standing page and rating changes page of any contest would have those option to filter the 'standing and rating change' according to "Country", "Organization" and "City", one could easily see and compare the performance of all contestants from his organization or city or country in that contest.
I request to add this feature in the standing page.
Thanks in advance,