can i program the Atmega 3209 with arduino

I want to use the atmega 3209 and i want to program it through arduino i like to know witch library file i need to programm the bootloader and witch bord file i need to programm the software

if some one knows how it will be a gread help for me

Not yet.

The 3209 has significantly different peripherals from the existing AVR Arduinos, so the existing cores and libraries will not work.

The new "Arduino Uno WiFi 2" is supposed to use a 4809, which is the same as 3209 (except more memory), so THAT code may work on the 3209. But it hasn't been released yet. (Any day now? - original estimates were "June", and some distributors expect stock in early november.)