Is it possible to set up a VPN for only one PC user (Vista Home Premium)?

Question

VPN

Hello, misters habraguru!
There is a desire to increase your anonymity when using the Internet. To do this, I specifically made a separate user profile on the machine and got access to the Internet through an encrypted VPN.
However, the minus of the existing solution is that when a VPN is connected, it becomes the main network connection for all users at once, that is, traffic from other users logged in at that moment that does not need to be anonymized is driven through the VPN unnecessarily (along with undesirable side effects such as slowing down communication) .
Accordingly, I want to make sure that the VPN connection affects only one specific user.
A search on the Internet for a ready-made solution to the issue did not suggest, the VPN service support assured me that I generally wish for the impossible. But it is hard to believe that such a seemingly simple thing is actually unattainable.
Therefore, the question is for respected network technology experts: is it possible to do it the way I want, and if so, how to do it? And if not, does this impossibility have any fundamental reasons, or is it just that the developers didn’t get their hands on it?
Thanks in advance to everyone who responds =).

Answer 1

Alternatively, you can start a virtual machine and forward it through vpn. At the same time, security with anonymity can be improved - it is very simple and convenient, if necessary, to upload snapshots with a “clean” system.

Answer 2

But it is hard to believe that such a seemingly simple thing is actually unattainable.
the fact is that in these computers of yours a certain model of interaction of open systems is adopted, which they try to adhere to: the lower levels of the systems do not know anything about the upper ones. that is, the network stack is not required to know that the system can be multi-user in general and solves only the problem of “transfer data”, and not “transfer data to Kolya or Vasya”.
what you are asking, nevertheless, is feasible on Linux - there is an opportunity to discriminate packets in netfilter and iproute2 by uid criterion, but never on Windows. the best thing you can do is enter routes to the nodes you need that require anonymity through a VPN, or direct your applications through a proxy server