how supplement enterprising 'where' clauses linq query?

i've got user list bitmask contains user's roles. linq query next advantage users whose roles consolidate 1, 4 16.

var users = u dc.users
            where ((u.userrolesbitmask & 1) == 1)
               || ((u.userrolesbitmask & 4) == 4)
               || ((u.userrolesbitmask & 16) == 16)
            name u;

i'd rewrite slight next advantage users given roles i reuse it:

private list<user> getusersfromroles(uint[] userroles) {}

any pointers boldly build query? thanks