Receive Webhooks and delegate data to right user

Basically I send an API call to create an instance to another site with a unique id for the user who sends the call, the site sends a webhook back to bubble with information (with the unique id included). Everything so far works, my issue is that I am not sure how to get bubble to give each user the right instance/information? Say I have ten users all in this process at the same time and then the bubble webhook gets all of the instance information (a few strings and the unique id) how do I get bubble to assign the right instance to each individual user? I am new to the webhook and am still trying to figure it out. I tried assigning the webhook/instance values to the right user by having an ‘only when’ condition of ‘Current User’s Unique ID is ‘Unique_ID’’. But that doesn’t assign the information to the correct user, I think because the webhook is a backend workflow. Any help is greatly appreciated!

Just search for the User based on the unique ID.

Thank you I didn’t know this was an option.