While wife can be enrolled as Service Voter, a son / daughter, father/ mother and dependants cannot be enrolled as Service Voter
No person can be enrolled on more than one electoral roll i.e. when you enroll as a service voter you have to submit a declaration - that you did not get enrolled as a general elector
Please remember that you have only one vote. Accordingly.
You can enroll as a Service Voter if you are
in the Armed Forces of India
from Assam Rifles, CRPF, BSF, ITBF; GREF in Border Road Organisation; CISF and NSG.
employed under the Government of India, in a post outside India.
member of an Armed Police Force of a State, and serving outside that state.