Something very similar can be achieved in HAProxy using a powerful feature called stick tables. [1] [2] [3]

[1] https://www.haproxy.com/blog/introduction-to-haproxy-stick-t...

[2] https://www.haproxy.com/blog/bot-protection-with-haproxy/

[3] https://www.haproxy.com/blog/using-haproxy-as-an-api-gateway...