Registering .US domain name..

[domain]

Is it legally allowed to register .us domain name any one not related to US at all?

[onetimeplease]

No it is not possible to register .us domain name those who are not related to USA.
The Requirements state that registrants of .US domain names can be either:
An individual who is a citizen of, or lives in, the United States and any of it possessions or territories.
An organisation or company based within the United States, or any of its possessions or territories. This includes all non-commercial, federal, state, or local governmental organisations, and their respective subdivisions, as long as they are based within the United States.

You can register .us domain name for low cost at Tucktail.com .