Restriction is a synonym of Limitation. Limitation is a type of Regulation. Regulation is similar to Standard. Standard is a type of Rule. 
Demand is a type of Activity. Demand is related to Threat. 
Restriction <--Synonym--> Limitation --IsA--> Regulation <--SimilarTo--> Standard --IsA--> Rule 
Activity <--IsA-- Demand <--RelatedTo--> Threat 