Quid if you have many Variables in the image field.
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1) Create new sequences
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Assuming you already have a sequence for SS Cyg, from LesvePhotometry export the sequence and you will have something like this:

Variable #SSCyg#SS Cyg##080119##21 42 42.8#43 35 10#000-BCP-198#000-BCP-202#000-BCP-241#000-BCP-207#000-BCP-222#000-BCP-230#000-BCP-221####C#R#CK#C#C#C#C####UGSS
Comparison #000-BCP-198#98#21:42:20.24#43:34:03.3#10.162#9.794#9.601#9.423###10.4#####
Comparison #000-BCP-202#109#21 42 27.17#43 33 44.6#11.421#10.897#10.59#10.306########
Comparison #000-BCP-241#114#21 43 20.12#43 36 38.8#12.041#11.419#11.052#10.728########
Comparison #000-BCP-207#119#21 42 34.97#43 39 17.1#12.486#11.866#11.507#11.163########
Comparison #000-BCP-222#123#21 42 44.96#43 40 28.2#12.898#12.279#11.937#11.542########
Comparison #000-BCP-230#128#21 43 4.02#43 35 27.5#13.458#12.807#12.418#12.014########
Comparison #000-BCP-221#134#21 42 43.38#43 34 23.5#13.809#13.363#13.103#12.827########


You will have to create new sequences for the other Variables but with the same comparison stars.
You need new table indexes, "aavsonames" and new RA and DE coordinates for each other variable stars. 
The aavsonames probably don't exist, so choose a convenient name. But you will not be able to submit the data to aavso database.
So you will create a text file containing a line for each other Variables (V1 V2 V3) :

Variable #SSCygV1#SS CygV1##080119##V1 RA#V1 DE#000-BCP-198#000-BCP-202#000-BCP-241#000-BCP-207#000-BCP-222#000-BCP-230#000-BCP-221####C#R#CK#C#C#C#C####UGSS
Variable #SSCygV2#SS CygV2##080119##V2 RA#V2 DE#000-BCP-198#000-BCP-202#000-BCP-241#000-BCP-207#000-BCP-222#000-BCP-230#000-BCP-221####C#R#CK#C#C#C#C####UGSS
Variable #SSCygV3#SS CygV1##080119##V3 RA#V3 DE#000-BCP-198#000-BCP-202#000-BCP-241#000-BCP-207#000-BCP-222#000-BCP-230#000-BCP-221####C#R#CK#C#C#C#C####UGSS

It's not necessary to repeat the lines corresponding to the comparison stars.

save this file and import it your LesvePhotometry database.


2) Create a batch file (SSCygV.bat)
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cd "C:\Program Files (x86)\Common Files\DPP Lesve\LesvePhotometry"
LesvePhotometry.exe C:\Users\Pierre\Documents\_AstroImages\2019-10-02 /im SSCyg /vi SSCygV1 /vi SSCygV2 /vi SSCygV3

The first line defines the directory where the LesvePhotometry program is located.
The second line is the command line launching LesvePhotometry, the parameters are


C:\Users\Pierre\Documents\_AstroImages\2019-10-02 
the directory containing your images

/im SSCyg 
a separator /im followed by the first part of the image names (e.g. SSCyg#2019-xx-30C 30sec.fits) - (/im is for image)

/vi SSCygV1
a separator /vi followed by the table index of the SSCygV1 star - (/vi is for variable index)

The directory C:\Users\Pierre\Documents\_AstroImages\2019-10-02 may contain images of other stars, 
but those images will not be reduced when launching the batch file

When you launch a new session on new images, in the batch file you have just to change 
the last part of the directory, in this example 2019-10-02

If the command line doesn't find the separators /im and /vi 
all the images in the directory will be reduced as usual on the base of name of images.


Remark
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If you find the command line is too long you may use a textfile to describe the variables as in the following example

cd "C:\Program Files (x86)\Common Files\DPP Lesve\LesvePhotometry"
LesvePhotometry.exe C:\Users\Pierre\Documents\_AstroImages\2019-10-02 /txt multiSSCY.txt

with multiSSCY.txt being a file located where your LesvePhotometry database is stored. 

The content of this file is:
/im SSCyg 
/vi SSCygV1 /vi SSCygV2 
/vi SSCygV3


3) Launch the batch file
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In WindowsExplorer(win7)  File Explorer(win10), double click on the batch file name to launch it.