Referrals - Make Them Req. Specific?

Summary

Can you make referrals req. specific?

Content

Morning,

Prior to me taking over TBE, a referral field was added to the candidates application where they could enter the name of the person who referred them.

Is there a way to make the referral field req. specific?

We have candidates who have applied in the past & may put someone's name into the referral section, then apply a year later after being referred by someone else for another position....if that makes sense.

Basically I would like to track who should get the referral if a candidate is hired for a specific position.