On this page, you can choose for which of your contacts (numbers) the filter will be applied.
Important clarification! You will not receive all SMS from this person (the application does not intercept SMS from other devices/numbers). It's just that this filter will be applied to SMS sent to your phone from this person.
To select contacts, click on the button in the lower right corner:
If you grant permission to read contacts, the application will parse your contact book for a short time and add them to the application. Here you can select contacts or groups of contacts for which the filter will be applied:
You can also change the contact comparison method to "forward SMS from all contacts except the selected ones", for this there is a switch at the top of the screen:
