You can use netdestination to map names to an IP addres
(Aruba651) (config) #netdestination ?
STRING Name of destination host or subnet
(Aruba651) (config) #netdestination server
(Aruba651) (config-dest) #host 1.1.1.1
(Aruba651) (config-dest) #exit
(Aruba651) (config) #show netdestination server
server
------
Position Type IP addr Mask-Len/Range
-------- ---- ------- --------------
1 host 1.1.1.1 32
You can use this name in an ACL instead of the IP address
For example:
user alias "server" any permit