import re

pattern = re.compile(r'(?:port (?P<port>\d+))|(?:Logon ID:\t\t(?P<id>\w+)\r\n\tLogon)')
s1 = 'port 1234'
s2 = 'Logon ID:\t\tadmin\r\n\tLogon'

print(pattern.match(s1).groupdict())
print(pattern.match(s2).groupdict())