Keeping selected ports to a previous version

[Riccardo Mottola]

Hi All,

can selected ports be kept at a previous version?
E.g. gimp 2.10 currently doesn't compile on older MacOS versions. I have 
supplied Ken some patches that will fix it on 10.6, but 10.5 and 10.4 
are very dyfficult, perhaps impossible. 2.8 continues to work. I'd like 
to keep that. Can I use e.g. Ken's repository just for that single, e.g. 
https://github.com/kencu/LeopardPorts or do I need toc ompletely 
"switch" repository?
I suppose this is not the only port that is troublesome neither that I 
am the only one in this situaation.

Thank you,

Riccardo