This is a Locale Plug-in.
It enable you to detect Call.
You can set that condition is true only for inbound or outbound call.
You can also set both call type.
And last for inbound call you can select contact or group to filter. Thats is to say, contact or group for who condition is true when inbound call is received. This is only for inbound filter call type. No filter available for outbound call type.