LTM iAppinsert date time and logonid

We have an iApp for creating standard LTM applications (using tmsh commands). All works fine. Now we would like to insert a description saying who created this application at which date and time. Is this possible? and How.

In implementation section we have now:

        set vvs  "ltm virtual /Infrabel/$vapp.app/$vapp$vvs1 {
            app-service /Infrabel/$vapp.app/$vapp
            destination /Infrabel/$venv:$::new__port
            ip-protocol tcp
            mask 255.255.255.255
            rules $virules
            $vpers
            pool /Infrabel/$vapp.app/$vapp$vpool1
            source $vsource
            profiles $vprof
            source-address-translation $vautomap
            translate-address enabled
            translate-port enabled
            }"

        tmsh::create $vvs

We would like to insert a description APPL created by $vuser at $vdate $vtime

How can we achieve this - any help appreciated

Jan