Hey @arpan-garg  -  for something like that I would use a secondary identifier in the event so that the items in the array could be considered individual triggers - this would allow you to send a custom action for each. 

Hi @marc_stowe_za  - we plan to GA the ability to use dataset lookup in fragments at the beginning of the year. Additionally, the ability to use dataset lookup in journey canvas node will also be available early next year. 

Agree with @_Manoj_Kumar_  - best way to achieve this is to have 2 app surfaces.