Can Mikrotik restrict access to the lok. network to a specific IP in loc. network?

Question

Access rights

There is a network 192.168.0.0/24, there are several PCs that need to restrict access to the local network. (Without a domain). added 192.168.1.0/24. where to dig?

Answer 1

Set the second ip address from the network 192.168.1.0/24 on the LAN interface and specify it as the default gateway for these two computers. Well, configure the firewall rules to block access to the network 192.168.0.0/24 and to allow access from the network 192.168.1.0/24 to the Internet.
But simply bringing computers to another network is not an option, because addresses can be changed. For a more reliable restriction, you need either vlan or a separate switch.

Answer 2

Psychics quit today, show Nat and the firewall rules.