Can we pull user profile or username from UUID present in the log files?

I'm assuming you already have the user UUID pulled from the log file that you want to find; I don't know if there's an in-system way to do this in particular. However I previously wrote the following functionality which finds the user belonging to the UUID you're looking for, here referred to as ri!findUUID:

with(
  local!allUsers: getdistinctusers(cons!GROUP_CONTAINING_ALL_USERS),

  local!allUUIDs: apply(
    fn!user(
      _,
      "uuid"
    ),
    local!allUsers
  ),

  local!lookupTable: joinarray(
    apply(
      fn!concat,
      merge(
        local!allUsers,
        repeat(length(local!allUsers), " - "),
        local!allUUIDs
      )
    ),
    char(10)
  ),


  local!foundUser: index(local!allUsers, wherecontains(ri!findUUID, local!allUUIDs)),

  "Found: " & local!foundUser & char(10)&char(10) & "List:" & char(10) & local!lookupTable
)

(EDIT: note that this trick should no longer be needed in at least the recent few versions, please see my newest response further down-thread from here).

I'm assuming you already have the user UUID pulled from the log file that you want to find; I don't know if there's an in-system way to do this in particular. However I previously wrote the following functionality which finds the user belonging to the UUID you're looking for, here referred to as ri!findUUID:

with(
  local!allUsers: getdistinctusers(cons!GROUP_CONTAINING_ALL_USERS),

  local!allUUIDs: apply(
    fn!user(
      _,
      "uuid"
    ),
    local!allUsers
  ),

  local!lookupTable: joinarray(
    apply(
      fn!concat,
      merge(
        local!allUsers,
        repeat(length(local!allUsers), " - "),
        local!allUUIDs
      )
    ),
    char(10)
  ),


  local!foundUser: index(local!allUsers, wherecontains(ri!findUUID, local!allUUIDs)),

  "Found: " & local!foundUser & char(10)&char(10) & "List:" & char(10) & local!lookupTable
)

(EDIT: note that this trick should no longer be needed in at least the recent few versions, please see my newest response further down-thread from here).