If you trade between them - sure. If you do not trade or interact between accounts ever (even through secondary accounts) - I seriously doubt that they can ban a main account which does not break any rules.
But how can I give currency And items from my Second Account to my First Account without interacting im Kinda scared now, im always inviting my Second Acc to my Guild , let him throw his stuff into the stash, And then im kickin him again. Does anyone have an idea how I can Not Banned on my Main?