One ESP8266 multiple switches

Hi,
used to programming, but new to MQTT....

So The client I am using (using the example published on this site forWIFI connected relay) uses one module and one parameter.
Online I can see it.
It seems easy also on client side to get parameter2. Seems easy to add parameter on server.

Question/Description:
I want one esp8266 to have several modules. (several relays)
At the same time, I would like that when I hit on or off on MQTT GUI to control parameter I send. Either 1 or 0, or other combination 12345 ot 987665.

Idea is that I built a gateway WIFI to RF using ESP8266 to control RF power outlets.... and ideally using MQTT directly. Other option is to create a wrapper app to behave as MQTT multiples clients and use standard HTTP protocols to the gateway....

Ideas?

Also, does the online iot server allow virtual module? I couldn't find the option.

I could create virtual modules that would be converted to one generic, connected to esp.

OK, and this ESP8266 broker could connect to other broker? And that will publish all the modules?