You can specify USB LAN adapter, as you have for the m3 or m3. But we need to build 1,000 units and USB load is crazy slow and difficult.
You need to open a ticket with Intel Customer Support.
Here are pages where you can lookup contact information, including local phone numbers, sorted by geography:
You can use phone, online forms service or email to do so. The above links provide local or toll-free numbers in most countries and support most local languages. You could also use the chat service (start here: http://intelsupportchat.force.com/icslivechat/ics_tech_desktop_ww_english_Chat), but understand that this service is offered in English only and is subject to the normal (9:00-5:00 M-F) office hours in the Pacific (UTC-8) time zone.
Hope this helps,