Problem with Accounts

Hello,

we are using 2 computers with 2 different adobe-accounts. The 2 computers are connected through the ethernet. the adobe support could not help us. Our problem now is that when we copy p.e. a text on computer 1 the person on computer 2 can paste the text onto his computer. how is this possible? it is a big problem because we are not able to work stressfree and without copying the others textes/elements etc.. if any of you has a solution please answer.

THX!!!!