Using the Multi Select Field results in a Lookup Feild

Using the Multi Select Field results in a Lookup Feild

I'm trying to user create a registration form to allow users to select their city, then from which city they select to display which services that city offers. In the City Form, the services have been selected via checkbox. In the user form, I've created the Lookup Field however it can't sort or exclude data based on what services where selected.

I've read several articles however all the design solutions seem to be for Zoho CRM. Is there away to do this through the creator?

Thanks