Restrict Service Request Search by Group

We are designing teleservice solution where we would give teleservice (SR form) access to third party service providers. Since there are multiple service providers, we want to restrict them from viewing each other's requests.

They will all be separate vendor groups within one or separate countries. SRs get assigned to those groups based on territory rules.

We can use Agent Dashboard to restrict what open SR/Tasks are viewable but searching is still allowing to see all SRs