Sure, if you are just passing text values, all destined for testing a single field, then you can pass the argument as a single delimited string, and parse it in the macro. Can't write the parse code off the top of my head, but the call would look like -
get_type("value_1, value_2, value_3")
Or, you could pass the arguments as an already-configured string like
get_type("my_field=value_1 OR my_field=value_2 OR my_field=value_3")
and just invoke the argument as
| where $arg1$
It seems to me the first method gives a better abstraction barrier, but the second one should work just as well.