most of the time kidney disease is hereditary(sp??), diabetes could also cause kidney problems.. but studies have shown that with normal renal function high protein diets will have no effect on kidney function, or kidney related problems. so basically if you eat 1gram per lb of body weight then you're A okay! probably no more than 1.5 gram per lb, unless you're on performance enhancing supplements(vitamin S!, lol), then your body would require significantly more, but thats an entirely different discussion!
im just curious but where do you get soo much protein if you're conserned with getting too much?! i have to kick myself in the butt to get 200grams a day..