What special airspace exemptions are granted for civilian fighter jets? How do civilian fighter jet operations arrange airspace usage for conducting flight tours? Do they use military operation areas? If they fly into class A can they perform maneuvers, or do they need to stay below class A? One such operation is migflug.
When flying in airliners cross country I look out the window and think what it would be like to experience flying around and between cumulonimbus clouds in a jet fighter, but doubt ATC would allow it. It got me to wondering how the civilian jet tours handle airspace and speed restrictions.
The same regulations apply to civilian ex-military aircraft as they apply to any other aircraft. Whether flying IFR or VFR, you will need to comply with the same rules, e.g. speed restrictions, airspace restrictions when under VFR, meteorological conditions, etc.

An exception can be speed restrictions, where a speed restriction would be in contradiction with the parameters of the aircraft to perform safe flight, e.g. the minimum clean speed being above 250kts or similar.