Is it possible with aiogram to know, who sent the message?

So the Telegram Bot can do different actions, depending on who activated the command. This concerns aiogram, a framework for Telegram Bot API

Answer

You could use a simple filtering system:

1. Create a dict/database with user_id’s and their roles
2. Get the role from that dict/db by id and do the action

This solution in code:

roles={1234:'Admin', 1243:'User', 1223:'Moderator'}

@dp.message_handler()
async def handler(message: types.Message) -> None:
    role=roles[message.from_user.id]

    if role=='Admin': do_action()
    elif role=='User': do_another_action()
    elif role=='Moderator': do_yet_another_action()

#you can add a check at start, to see if person even has a role
#if message.from_user.id in roles: