Powerconnect 2848 multiple vlan IP addresses

Hi everyone. 

Im a bit new to all this, but I have a Dell power curve 2848 in my office. It runs on the subnet of 192.168.0.x normally. is it possible to run a vlan with this router to a single port? i want to link in one of my sites with a wireless link to share the single internet connection, but this site runs on the 192.168.68.x sumbet - So I need to switch to be both 192.168.0.251 and 192.168.68.251 for this to work. 

Is this possible? I have had it done with a cisco modem, and if it would work with the Dell switch that would be awesome