How to exclude spots originating outside a specified radius of my QTH?

Perhaps I missed seeing the Trigger solution to EXCLUDE spots originating outside a, let’s say a 1000 mile, radius of my QTH?

Or, in other words, with HamAlert, how can spots be received only originating from USA call areas 4, 8,3,2 and 1?

Other than that unresolved issue, thank you for a very valuable tool.

73 de Ric wo4o

Digging deeper it seems setting a Trigger for spotting stations within my CQ Zone as a Condition may adequately produce the result sought.