Not sure why you are using metadata with the ID for catalytic lens, when I open up my tekkit and use NEI to check the item ID, it only shows 27556 for the catalytic lens (no metadata).
Try this:
groups:
Member:
default: true
permissions:
- -modifyworld.items.(have|drop|pickup).(27556.?*)
- mbr.mbce
- mbr.fortune
- mbr.mb
- modifyworld.*
options:
rank: '1000'
[ modifyworld.* ] must go AFTER all other modifyworld nodes, if you put it at the top it will check, see the [ .* ] node, and stop checking for restrictions.
If you don't have [ modifyworld.* ] anywhere in your group, you won't be able to interact with anything else in game except for the items/blocks you have given permission for.
Also, don't use the "x" anymore, they removed this necessity in one of the more recent versions of permissionsex.