Set DSCP Value for process against lag spikes due to steamupdates

[DSDV]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
Set DSCP Flag for any network traffic with the origin of a specific process

Describe alternatives you've considered
have not found alternatives inside linux (yet)

Additional context
Before the linux age in M$ Windows you could go into gpedit chose and *exe and set DSCP value for it.
So the traffic got lower or higher priority depending on the value.

this way you could not only avoid lag / ping spikes in your network but also when you had parallel downloads (for example steam updates)

(example tutorial for M$ Windows: https://www.reddit.com/r/GlobalOffensive/comments/24xq5f/qos_how_to_stop_other_programs_from_making_your/

with kind regards