luup.call_action to a CATEGORY?

in the docs for luup requests ([url=http://wiki.micasaverde.com/index.php/Luup_Requests#action]http://wiki.micasaverde.com/index.php/Luup_Requests#action[/url]), it shows that i can call an action to act on all the members of a category, so for example, if i want to lock all my doors i can issue this request:

http://veraIP:3480/data_request?id=action&output_format=xml&Category=7&serviceId=urn:micasaverde-com:serviceId:DoorLock1&action=SetTarget&newTargetValue=1

in looking at the luup lua extensions ([url=http://wiki.micasaverde.com/index.php/Luup_Lua_extensions#function:_call_action]http://wiki.micasaverde.com/index.php/Luup_Lua_extensions#function:_call_action[/url]), there is also a call action in there, but it only acts on a single device? is there a way to pass it a category instead of the device.

Just trying to be lazy and not loop through all the devices of a kind.