Can i use the same Firewall in a VPN connection between to sites?

I have a VPN Connectivity between Office 1 and office 2. Each office has separate internet connection.

Office 1 IP Address 10.0.0.1 mask is 255.255.255.0. zyxel router ( domain)

Office 2 IP address starts from 192.168.5.2 subnet mask is 255.255.255.0 zyxel router ( workgroup)
I also have a firewall in office 2 which protect and control users for office 2.
Is it possible users from office 1 to use internet access throw the firewall from office 2 so i can control their access to the internet ? What changes i have to make to the addressing or what to configure to succeed?