Send Only Certain Keys Through Octopus for WoW?

Hi all! Just started dual-boxing last week and have been trying a couple of different class combinations. This is a lot of fun :)

I'm trying Octopus right now, but I'm trying to figure out how I can pass only certain keys directly to the second WoW session. For example I've tried:

Shift + 1 = With no keys black or whitelisted, everything should be registered, and on 2nd WoW Character bound Shift+1 to Toolbar 1 Button 1, 1st WoW Character normal key setup. They BOTH cast spell 1. This was rather unexpected because I wouldn't expect the WoW Screen 1 to register Shift + 1 as 2 separate keys.

I also tried:
Shift Key Toggles Key Broadcaast (while holding) : this seems to have the same result though. When I push the number 1, it will send to the main, and Shift+1 just sends to both. Not really the result I'm wanting.

So long story short, is there a way to create a modifier or setup something so that the key pressed ONLY goes to the sub-instances and NOT the main instance? If other software does it I'm open to that as well :) Thanks all!!

I'm not aware of a way to set up Octopus to xmit different keys to different clients.

I think you need to create a binding on the main for shift 1 (what is commonly done is use an empty action bar slot solely to pick up all the modified combos that would otherwise trigger normal actions)