I naturally carbonate or "cask condition" all my kegged beers.
There are a few reasons why I do this, mainly because I use soda stream bottles to serve the kegs and because I like the traditional method.
I chill my fermenter to 7C for 3 days and then filter with a 5 micron pleated filter which still allows enough yeast through to do the job, but stops any chunky bits. I then add dextrose or DME to the keg (at what ever rate beersmith suggests for the style) and then burp the keg with CO2 a few times to get rid of any oxygen. I leave enough CO2 in there to keep a positive pressure on the lid seal. I then give the keg a gentile shake to mix the dextrose/DME into the beer and then put the keg into my fermentation fridge set at the same temperature the beer was fermented at.
In about 1-2 weeks, I transfer the keg to the serving fridge. After a day or two, I hook up the gas and pour 1-2 pints until the beer runs clear.
I find using a 5 micron filter leaves just a slight dusting of yeast on the bottom of the keg. If you don't filter, the yeast layer can be much thicker. Either way, as long as you don't disturb the keg, you won't get any yeast after the first 1-2 pours. If the keg gets knocked or moved, just repeat the steps.
I use the same method for my bottled beers, but double the amount of dextrose/DME.
I like using the soda stream bottles because I can serve a few kegs from one bottle. Though I have spares, if I run out, I can swap them at the local woolies.