Incorrect. There are no "wallets" on the blockchain. In fact, the blockchain is not even organized by address. The blockchain is simply a ledger of inputs and outputs, most of which refer to a certain address or addresses (but not to wallets).
If someone uses a new Bitcoin address for each transaction, there is no way outside of statistical analysis (which may not even work in many cases) to know which addresses belongs to which wallets.
If someone uses a new Bitcoin address for each transaction, there is no way outside of statistical analysis (which may not even work in many cases) to know which addresses belongs to which wallets.