LNproxy is a straightforward privacy tool designed to enhance the confidentiality of lightning invoices. It provides users of custodial Lightning wallets with improved payment destination privacy, while also offering greater receiver privacy for those running their own nodes.
At present, every Lightning invoice includes the public key of the destination node. Since this key is fixed, if one invoice is associated with you, it becomes possible to infer that all subsequent invoices are also generated by you, leading to the assumption that payments are directed to you.