If there are a large number of extensions it may be easier to specify ALL and then subtract the extension you don't want.
Like:
perm=supervisor:dial,spy,chat,preferences:All,-SIP/101

Instead of:
perm=supervisor:dial,spy,chat,preferences:SIP/102,SIP/103,SIP/104,SIP/105,SIP/106,SIP/107,SIP/108,SIP/109,SIP/110

Or maybe allow ranges:
perm=supervisor:dial,spy,chat,preferences:SIP/102..110