As said the title;
Is it possible to know if two or more addresses are related to one wallet? and if from transactions i can figure possible connection (same wallet) between addresses.
I post this here because i think it's a beginner question, no?
Just from the transaction, depending on how you execute the transactions and if you use any interpolating xfers, maybe.
If you created a wallet from a seed, and use different addresses from that seed, and someone, lets say law enforcement gets your seed,
then yes, they can prove the different addys are connected.
/KX