I don't think you can.... Unless you saved that person's list or anything they upload on their homepage
Tell them to send their homepage
Or leave a comment in a series you both read
Leave a comment in the Question area
display names don't work, you can either ask for their account link or account serial number
Thanks! (=・ω・=) although they could make an upgrade for that. Would be awesome!
How to search for someone’s name?