Modified the note related to network policy.

Author: subhtk

modules/nw-networkpolicy-about.adoc

@@ -12,7 +12,9 @@ In {product-title} {product-version}, OpenShift SDN supports using network polic
 
 [WARNING]
 ====
-Network policy does not apply to the host network namespace. Pods with host networking enabled are unaffected by network policy rules.
+Network policy does not apply to the host network namespace. Pods with host networking enabled are unaffected by network policy rules. However, pods connecting to the host-networked pods might be affected by the network policy rules.
+
+Network policies cannot block traffic from localhost or from their resident nodes.
 ====
 
 By default, all pods in a project are accessible from other pods and network endpoints. To isolate one or more pods in a project, you can create `NetworkPolicy` objects in that project to indicate the allowed incoming connections. Project administrators can create and delete `NetworkPolicy` objects within their own project.