Actually ABan only offers the functions required to make a ban system So, you need to make your own command with these functions.
 
 BanIP(IP[], Admin[], Player[], Reason[])
 Unbanip(IP[])
 BanCheckIP(player)
 Unbanname(name[])
 BanName(IP[], Admin[], Player[], Reason[])
 BanCheckName(player)
 GetSubnet(IP[])
 Subnetunban(IP[])
 SubnetbanCheck(player)
 Subnetban(IP[], Admin[], Player[], Reason[])
If you don't know how to do it then try editing ban command from one of the released script.