Ability to change source value for agents

Hello everyone!

Are you able to change the Source of the candidate while he/she was referred by an agent?

For us would be better when referred candidate will have source like the name of the agency that referred him/her

For example:

Agent John from Recruiting Agency "RecAg" referred a candidate the source of the candidate will be John, is it possible to make it RegAg?

Thank you,

Vladyslav