You are looking for MoorMap. It doesn't automatically add the nodes based on loot messages (we can't access map coordinates in a chat filter) but does allow you to annotate a copy of the parchment maps and has a tool specifically for quickly adding nodes. Bear in mind that unlike WoW, there is very little of the interface exposed to Lua, for instance, player coordinates are not accessible without the user clicking a specially formatted quickslot control, so some of the functionality you will find in LoTRO Lua plugins is limitted and authors have to jump through hoops just to give the limited functionality you see.
http://www.lotrointerface.com/downlo...2-MoorMap.html