@Ivan_Mironchuk Thanks for the update, do we have any beta documentation around it? So, is that we can use two email as identifier?

@SatheeskannaK do we have any idea when this feature will come to GA? Secondly, i would like to understand, there isn't any if condition in the dataset code. So how it will pickup from there for a personalization under it. 

Now, we can do the following way under the channel surface creation. There is a delivery address which can overwrite the execution field. please find the below screenshot and the URL for reference. Configure email settings | Adobe Journey Optimizer