Your question is somewhat vague as to your current setup. To simply forward port 22... Yes this can be done... You can do this quite easily with NAT.
ip nat inside source static tcp 10.0.0.1 22 202.202.202.2 22
Now, if you have a bunch of boxes you need to ssh to you can still use one IP address and specify ports in your SSH client.
ip nat inside source static tcp 10.0.0.1 22 202.202.202.2 1030
ip nat inside source static tcp 10.0.0.2 22 202.202.202.2 1031
ip nat inside source static tcp 10.0.0.3 22 202.202.202.2 1032
See the following link for more information...
http://cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094e77.shtml