What type of requirement is it that the application should only operate within the territory of the Russian Federation?

The requirement that the application must operate only within the territory of the Russian Federation falls under the category of geographical or territorial restrictions. This may be related to legal, regulatory, or political reasons, such as compliance with data localization laws, export control restrictions, or company policies.

In terms of requirements, this can be classified as a constraint or a non-functional requirement that affects the architecture and infrastructure of the application, such as server selection, geoblocking configurations, IP access controls, etc.