[AutoComplete] *requesting* multiple values (NOT displaying multiple values)

[AutoComplete] *requesting* multiple values (NOT displaying multiple values)

Hi,
currently, the AutoComplete pluging (with 'multiple' option either set to true or to false), is requesting the server with the last word entered into the UI control (input or textarea). Isn't it ?
I would be very pleased to be able to request the server with all the values entered into the UI control - not only the last one.
Why ? because we could imagine a need where the response given by the server does not depend only on what the user is entering as its last value -> Imagine an input field with 3 comma-separated values : the first value is the country, the 2nd value is the state and the 3rd value is the city.
Thanks for understanding my need.
Didier