Bukkit

Op is default and if you want a regular user to have a permission you'll either have to get an permission system like PermissionsBukkit for SuperPerm's, GroupManager for non SuperPerm permissions, or just open the jar in an archive editor and edit the plugin.yml to your needs. SuperPerm nodes that are in plugin.yml: You can use these with PermissionsBukkit.

permissions:
  iSort.basic.all:
    description: Allows for the /sort all command.
    default: op
  iSort.basic.top:
    description: Allows for the /sort top command.
    default: op
  iSort.basic.range:
    description: Allows for /sort <0-35> <0-35> command.
    default: op
  iSort.basic.chest.command:
    description: Allows for the /sortchest and /srtc commands.
    default: op
  iSort.basic.chest.wand:
    description: Allows use of the wand to sort chests.
    default: op
  iSort.adv.stack:
    description: Allows the toggling automatic stacking using the /sort stack command.
    default: op
  iSort.adv.reload:
    description: Allows one to reload the config file with the /sort reload command
    default: op
  iSort.basic.*:
    description: All of the basic commands.
    children:
      iSort.basic.all: true
      iSort.basic.top: true
      iSort.basic.range: true
      iSort.basic.chest.command: true
      iSort.basic.chest.wand: true
  iSort.adv.*:
    description: All of the needed adv commands.
    children:
      iSort.adv.stack: true
  iSort.all:
    description: All of the needed commands.
    children:
      iSort.basic.all: true
      iSort.basic.top: true
      iSort.basic.range: true
      iSort.basic.chest.command: true
      iSort.basic.chest.wand: true
      iSort.adv.stack: true

As you can see I made the parent node

iSort.all

have all the commands except /sort reload. Non SuperPerm Permissions: Use these with GroupManager or Permissions 2.

iSort.basic.all - /sort all command
iSort.basic.top - /sort top command
iSort.basic.range - /sort [0-35] [0-35] command
iSort.basic.chest.command - /sortchest command
iSort.basic.chest.wand - Wand based chest sorting
iSort.adv.stack - /sort stack command
iSort.adv.reload - /sort reload command