When the query selection is used in a Combination ticket, Altru looks at the program record ID when using the selection within the combination setup, which allows all program events within a program to be available for purchase within the Combination.

In order to only have a certain program event allowed for purchase within a Combination, users would need to set up that program event in a separate scheduled program, that ONLY includes that event in the Event List. 

Please view our program to set up a scheduled program here