Anemones will grow faster if they are spot fed. As mentioned, host species naturally have a compliment of zooxanthellae, which are symbiotic algae, and the majority of the anemones nutritional needs are supplied by the algae. In a "well-fed" tank, you will likely not need to directly target feed your anemones.
As far as which anemone fish goes to which anemone, you will find that having a natural host will almost ensure the fish takes to the anemone right away. Clarkii are always your best bet, as they go to all the host species of anemone in nature. That said, BTAs host numerous clownfish in the wild, including maroons, cinnamon, tomato, and clarks. And BTAs will often host percs and ocellaris in aquariums.