Today if you create a symbol and add the family role as one of its attibutes, it works well, but if you intend to use this information into another symbol from the same family, it changes the family role text on both used symbols. It would be great to make the family role individual into all the family symbols inserted into the design, because it would give us the possibility to add additional information into some contacts that we use on our design.
More information is needed to better understnd the requirement. Please provide a detailed example or use case.