Hi @PrasanthPulipakala ,
Solace has a Message VPN concept that basically create an isolated environment for each. This helps to isolate any unrelated systems from interfering with another. Reference here: Message VPNs
But if we talk about clients of the same broker, you can always use the Access Control List feature to make sure each user will have isolated topic to pub/sub to. Note that you can use substitution variables such as client-id or client-username to allow you to create simple ACL profiles and not having to create a single ACL for every single client. Reference: Configuring ACL Profiles
–Ari