How to rewrite dns ttl basd on client ip.Thanks

Hi Friends

How to rewrite A-Records's TTL basd on different client ip at dns respons. Example:

Client A（IP：192.168.1.0/24） request ,GTM via GSLB wideip respons 202.0.0.1 TTL 600 or 111.0.0.1 TTL 600.

Client B（IP：192.168.2.0/24）as well as request ,GTM via GSLB wideip respons 202.0.0.1 or 111.0.0.1 but its TTL is "30".

Thanks