The ISPF panel language itself does not provide any means for a security check. But you might consider using embedded REXX when verifying a selected option.
Have a look at the manuals.
Your coding could look like
IF (&OPTION = 1)
access = 0
acee = c2d(storage(d2x(asxb+200),4))
len = c2d(storage(d2x(acee+29),1))
gid = storage(d2x(acee+30),len)
tid = storage(d2x(acee+64),8)
cgrp = c2d(storage(d2x(acee+116),4))
if cgrp <> 0 then do
if storage(d2x(cgrp),4) = "CGRP" then do
numofgrp = c2d(storage(d2x(cgrp+8),2))
grpent = cgrp+32
do i = 1 to numofgrp
group = storage(d2x(grpent),8)
if group = 'RACADM' then access = 1
grpent = grpent + 24
IF (&ACCESS = 0)
.MSG = MS0029
.MSGLOC = OPTION
This assumes that you're checking the selection variable OPTION. Now the REXX checks if the TSO user is a member of RACF group RACADM. If so it sets the variable ACCESS to "1", otherwise the variable will have "0". After processing the embedded REXX you can issue an error message according to the content of the variable ACCESS.
Give it a try
There are 10 types of people in the world: Those who understand binary, and those who don't.