судя по этому: On the other hand, a multi-entry national visa is also granted for certain individuals, allowing their holder to travel in and out of this Schengen country as he/she pleases and also travel throughout the whole Schengen Area without additional visa requirements.
https://www.schengenvisainfo.com/schengen-visa-types/#national-visasВъезжать можно только через страну, которая выдала, но ограничений на перемещение потом в пределах Шенгена, нет