BUG #15162: individual user can connect from anywhere with pgadmin

The following bug has been logged on the website:

Bug reference: 15162
Logged by: Ravikumar S
Email address: ravikkumar(dot)22(at)gmail(dot)com
PostgreSQL version: 10.3
Operating system: rhel
Description:

in pg_hba.conf
host all all 0.0.0.0/0 only pgadmin work from anywhere.
host all user 0.0.0.0/0 user cant connect from anywhere

my project's application server running from XX.XXX.XX.XX and i created
user for accessing database from that host
so in pg_hba.conf i configured this for app user.
host db1 apuser xx.xx.xxx.xxx/0

for monitoring purpose i created one more user with select permission only
he should connect database from anywhere.
with below configuration
host db1 apuser xx.xxx.xx.xx ---------for app user only connect
from that ip address
host db1 monuser 0.0.0.0/0 --------- this user should connect
from anywhere

its not working...is there any way for individual user connection
restriction in pg_hba.conf file.???

please help with this