How the particular client pull the policy from the cfengine server

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http://serverfault.com – I am working on the CFEngine, but i am newbie to this concept. for my requirement i am using single server and i am using 10 clients, now all the ten clients pull the policy from the server and executing the polices. But my requirement is, the policy is applicable for only one client from the 10, how could the particular client only pull the policies and execute it. Pls provide me the suggestion, i am very confusing with that.. Thanks (HowTos)