Is it possible to limit connecting users to a schema from specific terminal or program?

I read about Oracle ACL, but on first sight, it doesn't look like it limits the access to a schema on terminal, program level. Is it even possible? I did experience such limitation once. I was connecting by sqlplus from unix box, the same box the application scripts were connecting from. Is it, perhaps, related to Oracle Wallet? Goal: I want to limit direct access to an application schema. I already enabled proxy access. However web application on localhost does access application schema, from the same host that I want to limit direct access through any IDE. Is it possible to limit connectivity to schema from the same machine, depending on what terminal, or program wants to connect?