As per the IVAO Regulation S.1.9:
S.1.9. Divisions may permit all operations for foreign users. Any such permissions must be reported to the SO-HQ Department to be documented on this wiki page and included in the divisional SO Order.
Below you can find all the divisions that are not restricting the Special Operations flights to foreign users:
Currently, there are no divisions that allow SO Flights for foreign users.
If you are a Division HQ or Division SO Department and wish to remove restrictions on SO flights for foreign users, please do not hesitate to contact us at specops@ivao.aero.