HI @siva44 ,

You can use the Sample script below :

you can write something like the following script in the event1 param field of the create event activity as:

(function() {
var arr= [];

arr.push(current.variables.owned_by);
arr.push(current.variables.managed_by);
arr.push(current.variables.primary_product_owner);
arr.push(current.variables.requested_for.requester_name);

return arr.toString();

}());

Here all the users are stored in an array and returning that array to the event param1.