Unfortunately, IP addresses are often MORE traceable on decentralized networks then centralized networks. How so? Lets say Alice and Bob each use their own PCs as nodes on a decentralized messaging network. None of them use a VPN or proxy. If Alice sends Bob a message directly, Bob can just grab her IP since she is using her own PC as a node. However, if they were using a centralized service, that message would’ve been routed through the service’s servers.