divert to multiple public's IP

[vladone]

If i understand corectly with redirect_address i can forward an given
public ip (commonly an alias on pubic interface) to an internal ip
(private). I dont know if this is good for what i want.
More exactly description for what i want:
My private network is: 192.168.0.0/24
I have (example) public ip: 1.1.1.1, 1.1.1.6 and 1.1.1.9
I want:
ip's: 192.168.0.1-20 out(tranlated) with 1.1.1.1
ip's: 192.168.0.21-30 out with 1.1.1.6
 and so.