While logged into our HPC cluster I used w to check out who else was logged in. I happened to notice that it looks like there's another user logged in from my (personal) computer;

19:04:47 up 40 days,  6:39, 44 users,  load average: 0.10, 0.14, 0.18
USER            TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
ME             pts/4    zerg.neuron12. 18:55    0.00s  0.09s  0.04s w  
SOMEONE_ELSE   pts/35   zerg.neuron12. Sat14    2:27m  0.08s  0.08s -bash

Is this something I should be worried out - I tried to kill the other session but had a permission denied message. Is it possible we just both have the same hardware name? I'd have thought that if this were the case the server would give one of us a different name (e.g. zerg1) when we logged in to prevent confusion.

This is not an area I have any experience with, so any advice would be greatly appreciated!