I want to specify packet latency, loss, corruption, or any other feature for a specific traffic direction. For example, I want to specify packet loss for outgoing and latency for incoming. Is that possible?
No, I am afraid that's not possible. You can set corruption and/or loss in one or both directions, but not loss in one direction and corruption in another. I.e. the traffic direction setting affects all modifications in the same way.
So does the "incoming" and "outgoing" options under the Transfer tab affect all features or just the speed limit?
For example if I put speed limit "unlimited" and traffic direction "outgoing" and packet lost at 100% or any other feature, only the outgoing packets are going to be lost, right?
The Incoming and Outgoing options under the Transfer tab affect all features, not just the speed limit. So you can simulate one-way latency and/or loss if needed.