Jeffery, we have plans to implement this functionality, but not in Oxwall 1.6. For now it's possible as a new plugin development or as the complicated code modification only. I suggest
that you download our new Plugin Skeleton plugin to see how to use this
or that function. Here is URL to the Store item:
http://www.oxwall.org/store/item/695
If you are not familiar with the plugin development, it would be better for you to find a developer who can help you with it.
Most probably someone on this forum has already started to develop this
plugin and it will be available in the Store in the nearest. :)