Binding by a function / return value

I would like to 'binding' => 'locality' with a 'field_type' => 'select_advanced' (taxonomy type).
But the select options are specifics IDs and int, not strings.

Is there a way to do someting like
'binding' => get_term_by('name', 'locality', my_locality_taxo)
or
'binding' => myFunction( param:locality, return:value_of_select )
or perhaps :

binding => locality
binding_value => myFunction( param:locality, return:value_of_select )

If not, i will do that with a hidden field and some JS on change...

Thank You !