I had a little time over the weekend so I implemented an advanced search for UN Job List. You can refine your RSS feed / bookmark now by searching the United Nations job opportunities on UN Job List e.g. for everything that has “communication� in the job title but exclude “technology� if you are interested in real communication jobs and want to avoid the IT vacancies.
Check it out at: http://unjoblist.org/lists/advancedsearch

Leave me a comment below and tell me how it works. On the long run, I think this will become the only search on UN Job List.