So, you want to know if you can give your customer/friend/relative access to only awstats area of cpanel but not to the full cpanel?
Well, sadly no, everything access through your cpanel does require your cpanel login details, so parts of cpanel cannot be isolated for individual usage sadly.
You could try Google analytics but this isnt anywhere near as accurate and if you compare the statistics from AWstats and Google analytics, you will find that Google is not reporting anywhere near as much traffic as what you are actually getting.