[keycloak-user] Multiple direct access flows within a realm

Hi everyone, I am trying to understand if keycloak can support an authentication scenario. I have a realm which has multiple trusted clients authenticating. Some are mobile clients and some are web based clients. These clients use direct access token flow to exchange user credentials for a token. We'd like to support different credentials based on the client. I'd one client (web) to be able to use username/password for a token while another (mobile) client uses username and secure token like an OTP or a RSA SecurID. I have been able to create custom flows in my relam from the admin console and I can setup a flow which requires OTPs. However, I am unable to configure the flow per client. The only option I have been able to find is to change the flow for an entire realm. So my question is, is it possible to configure the OAuth flow in keycloak at the client level? If not, are there extension possibilities which could make this feasible? Thanks, Shailesh