1. A method for security policy management in a network comprising a plurality of hosts and at least one configurable policy enforcement point, comprising; creating one or more policy templates representing classes of usage control models within the network that are enforceable by configuration of the policy enforcement points; creating one or more policy instances, each based on a different one of the policy templates and instantiating the policy template for identified sets of hosts within the network to which the usage control model is to be applied, deploying the policy instances by generating and providing one or more configuration files for provisioning corresponding policy enforcement points within the network; controlling access to the policy templates and policy instances so that the policy templates are only modifiable by a first predeterminable user group, the policy instances are only modifiable by the first or a second predeterminable user group and the policy instances are only deployable by a third predeterminable user group.