Lua scripting language support has been added in Switchfin .The update has been commit in the Switchfin trunk

pbx_lua is an Asterisk module and a pbx switch that enables you to write and run dialplan code in Lua language.
For some more details please take a look at the Matthew's presentation at Astricon pbx_lua: Taking Asterisk Applications to the Next Level

Cheers!
Dimitar