Is there anyway to select particular dual app from app selection in kwgt or klwp? E g. Second whatsapp or viber account?
I don’t think this is natively possible. Maybe through Tasker?
Fin, is that the same as split screen?
I use a program with KLWP called Shortcut Maker.
In it you can create a shortcut where, with a tap, it will natively open your two chosen apps and split screen them. KLWP will recognize it as a shorcut and you can assign it to shapes or flows or whatevers.
If I’m way off, ignore me.
Just know it might be a week before I peek back in. 
Thanks for the reply but its not split screen. You can setup 2 accounts in WhatsApp on same phone. On app deawer there will be 2 separate icons for each account. But these options are not available when you try to pick from within klwp/kwgt.
First screenshot from within klwp and second from app drawer. In second screenshot you can see 2 icons for whatsapp but in klwp you only see one whatsapp icon.
Appreciate the clarity.
Android is unable to run to packages with identical names. Your two instances of Whatsapp, running concurrently, will have unique package names. Use those.
Apps like Shortcut Maker or Power Shortcuts work beautifully inside KLWP and will allow you to create a useable shortcut to any app, function, intent or package name on your device.