SSL VPN with posture/compliance for some client and some without

Hello.
We have configured the FGT as an SSL VPN terminator, implementing posture/compliance controls with the FortiClient EMS without any issues.
To force clients to not "skip" the posture and connect to the VPN by downloading FortiClient Free (since doing this the EMS cannot enforce the client's posture), we added the command in the FGT:

config system global
set vpn-ems-sn-check enable
end

We tested this and it works fine.
The issue is that now we need a mixed environment: clients with posture and clients without posture (i.e., FortiClient Free and not connected to the EMS).
For this, the current solution doesn't work anymore...

Is there a way to do this granularly by SSL VPN portal or similar? From what I've seen, SSL VPN is for the entire FGT globally.

thank you
regards